Bug 1344642 - Part 1: Cleanup dom.forms.datepicker related code

14 files changed, 16 insertions, 386 deletions

diff --git a/dom/html/HTMLInputElement.cpp b/dom/html/HTMLInputElement.cpp
index f1a54705e..3a3136a60 100644
--- a/dom/html/HTMLInputElement.cpp
+++ b/dom/html/HTMLInputElement.cpp
@@ -114,15 +114,12 @@
 #include <limits>
 
 #include "nsIColorPicker.h"
-#include "nsIDatePicker.h"
 #include "nsIStringEnumerator.h"
 #include "HTMLSplitOnSpacesTokenizer.h"
 #include "nsIController.h"
 #include "nsIMIMEInfo.h"
 #include "nsFrameSelection.h"
 
-#include "nsIConsoleService.h"
-
 // input type=date
 #include "js/Date.h"
 
@@ -543,8 +540,7 @@ GetDOMFileOrDirectoryPath(const OwningFileOrDirectory& aData,
 bool
 HTMLInputElement::ValueAsDateEnabled(JSContext* cx, JSObject* obj)
 {
-  return IsExperimentalFormsEnabled() || IsDatePickerEnabled() ||
-         IsInputDateTimeEnabled();
+  return IsExperimentalFormsEnabled() || IsInputDateTimeEnabled();
 }
 
 NS_IMETHODIMP
@@ -746,59 +742,6 @@ nsColorPickerShownCallback::Done(const nsAString& aColor)
 
 NS_IMPL_ISUPPORTS(nsColorPickerShownCallback, nsIColorPickerShownCallback)
 
-class DatePickerShownCallback final : public nsIDatePickerShownCallback
-{
-  ~DatePickerShownCallback() {}
-public:
-  DatePickerShownCallback(HTMLInputElement* aInput,
-                          nsIDatePicker* aDatePicker)
-    : mInput(aInput)
-    , mDatePicker(aDatePicker)
-  {}
-
-  NS_DECL_ISUPPORTS
-
-  NS_IMETHOD Done(const nsAString& aDate) override;
-  NS_IMETHOD Cancel() override;
-
-private:
-  RefPtr<HTMLInputElement> mInput;
-  nsCOMPtr<nsIDatePicker> mDatePicker;
-};
-
-NS_IMETHODIMP
-DatePickerShownCallback::Cancel()
-{
-  mInput->PickerClosed();
-  return NS_OK;
-}
-
-NS_IMETHODIMP
-DatePickerShownCallback::Done(const nsAString& aDate)
-{
-  nsAutoString oldValue;
-
-  mInput->PickerClosed();
-  mInput->GetValue(oldValue);
-
-  if(!oldValue.Equals(aDate)){
-    mInput->SetValue(aDate);
-    nsContentUtils::DispatchTrustedEvent(mInput->OwnerDoc(),
-                            static_cast<nsIDOMHTMLInputElement*>(mInput.get()),
-                            NS_LITERAL_STRING("input"), true,
-                            false);
-    return nsContentUtils::DispatchTrustedEvent(mInput->OwnerDoc(),
-                            static_cast<nsIDOMHTMLInputElement*>(mInput.get()),
-                            NS_LITERAL_STRING("change"), true,
-                            false);
-  }
-
-  return NS_OK;
-}
-
-NS_IMPL_ISUPPORTS(DatePickerShownCallback, nsIDatePickerShownCallback)
-
-
 bool
 HTMLInputElement::IsPopupBlocked() const
 {
@@ -824,56 +767,6 @@ HTMLInputElement::IsPopupBlocked() const
 }
 
 nsresult
-HTMLInputElement::InitDatePicker()
-{
-  if (!IsDatePickerEnabled()) {
-    return NS_OK;
-  }
-
-  if (mPickerRunning) {
-    NS_WARNING("Just one nsIDatePicker is allowed");
-    return NS_ERROR_FAILURE;
-  }
-
-  nsCOMPtr<nsIDocument> doc = OwnerDoc();
-
-  nsCOMPtr<nsPIDOMWindowOuter> win = doc->GetWindow();
-  if (!win) {
-    return NS_ERROR_FAILURE;
-  }
-
-  if (IsPopupBlocked()) {
-    win->FirePopupBlockedEvent(doc, nullptr, EmptyString(), EmptyString());
-    return NS_OK;
-  }
-
-  // Get Loc title
-  nsXPIDLString title;
-  nsContentUtils::GetLocalizedString(nsContentUtils::eFORMS_PROPERTIES,
-                                     "DatePicker", title);
-
-  nsresult rv;
-  nsCOMPtr<nsIDatePicker> datePicker = do_CreateInstance("@mozilla.org/datepicker;1", &rv);
-  if (!datePicker) {
-    return rv;
-  }
-
-  nsAutoString initialValue;
-  GetValueInternal(initialValue);
-  rv = datePicker->Init(win, title, initialValue);
-
-  nsCOMPtr<nsIDatePickerShownCallback> callback =
-    new DatePickerShownCallback(this, datePicker);
-
-  rv = datePicker->Open(callback);
-  if (NS_SUCCEEDED(rv)) {
-    mPickerRunning = true;
-  }
-
-  return rv;
-}
-
-nsresult
 HTMLInputElement::InitColorPicker()
 {
   if (mPickerRunning) {
@@ -2570,9 +2463,8 @@ HTMLInputElement::ApplyStep(int32_t aStep)
 bool
 HTMLInputElement::IsExperimentalMobileType(uint8_t aType)
 {
-  return (aType == NS_FORM_INPUT_DATE &&
-    !IsInputDateTimeEnabled() && !IsDatePickerEnabled()) ||
-    (aType == NS_FORM_INPUT_TIME && !IsInputDateTimeEnabled());
+  return (aType == NS_FORM_INPUT_DATE || aType == NS_FORM_INPUT_TIME) &&
+    !IsInputDateTimeEnabled();
 }
 
 bool
@@ -4429,9 +4321,6 @@ HTMLInputElement::MaybeInitPickers(EventChainPostVisitor& aVisitor)
   if (mType == NS_FORM_INPUT_COLOR) {
     return InitColorPicker();
   }
-  if (mType == NS_FORM_INPUT_DATE) {
-    return InitDatePicker();
-  }
 
   return NS_OK;
 }
@@ -5814,10 +5703,8 @@ HTMLInputElement::ParseTime(const nsAString& aValue, uint32_t* aResult)
 /* static */ bool
 HTMLInputElement::IsDateTimeTypeSupported(uint8_t aDateTimeInputType)
 {
-  return (aDateTimeInputType == NS_FORM_INPUT_DATE &&
-          (IsInputDateTimeEnabled() || IsExperimentalFormsEnabled() ||
-           IsDatePickerEnabled())) ||
-         (aDateTimeInputType == NS_FORM_INPUT_TIME &&
+  return ((aDateTimeInputType == NS_FORM_INPUT_DATE ||
+           aDateTimeInputType == NS_FORM_INPUT_TIME) &&
           (IsInputDateTimeEnabled() || IsExperimentalFormsEnabled())) ||
          ((aDateTimeInputType == NS_FORM_INPUT_MONTH ||
            aDateTimeInputType == NS_FORM_INPUT_WEEK ||
@@ -5870,20 +5757,6 @@ HTMLInputElement::IsDirPickerEnabled()
 }
 
 /* static */ bool
-HTMLInputElement::IsDatePickerEnabled()
-{
-  static bool sDatePickerEnabled = false;
-  static bool sDatePickerPrefCached = false;
-  if (!sDatePickerPrefCached) {
-    sDatePickerPrefCached = true;
-    Preferences::AddBoolVarCache(&sDatePickerEnabled, "dom.forms.datepicker",
-                                 false);
-  }
-
-  return sDatePickerEnabled;
-}
-
-/* static */ bool
 HTMLInputElement::IsExperimentalFormsEnabled()
 {
   static bool sExperimentalFormsEnabled = false;
diff --git a/dom/html/HTMLInputElement.h b/dom/html/HTMLInputElement.h
index adab663c3..305b76556 100644
--- a/dom/html/HTMLInputElement.h
+++ b/dom/html/HTMLInputElement.h
@@ -1451,7 +1451,6 @@ protected:
   };
   nsresult InitFilePicker(FilePickerType aType);
   nsresult InitColorPicker();
-  nsresult InitDatePicker();
 
   /**
    * Use this function before trying to open a picker.
@@ -1647,7 +1646,7 @@ private:
 
   /**
    * Checks if aDateTimeInputType should be supported based on "dom.forms.datetime",
-   * "dom.forms.datepicker" and "dom.experimental_forms".
+   * and "dom.experimental_forms".
    */
   static bool
   IsDateTimeTypeSupported(uint8_t aDateTimeInputType);
@@ -1674,13 +1673,6 @@ private:
   IsDirPickerEnabled();
 
   /**
-   * Checks preference "dom.forms.datepicker" to determine if date picker should
-   * be supported.
-   */
-  static bool
-  IsDatePickerEnabled();
-
-  /**
    * Checks preference "dom.experimental_forms" to determine if experimental
    * implementation of input element should be enabled.
    */
diff --git a/dom/html/test/forms/test_input_types_pref.html b/dom/html/test/forms/test_input_types_pref.html
index 243836f34..73c4d65ab 100644
--- a/dom/html/test/forms/test_input_types_pref.html
+++ b/dom/html/test/forms/test_input_types_pref.html
@@ -37,23 +37,15 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=764481
       inputType: "color",
       expectedType: "color"
     }, {
-      prefs: [["dom.experimental_forms", false], ["dom.forms.datepicker", false],
-              ["dom.forms.datetime", false]],
+      prefs: [["dom.experimental_forms", false], ["dom.forms.datetime", false]],
       inputType: "date",
       expectedType: "text"
     }, {
-      prefs: [["dom.experimental_forms", true], ["dom.forms.datepicker", false],
-              ["dom.forms.datetime", false]],
+      prefs: [["dom.experimental_forms", true], ["dom.forms.datetime", false]],
       inputType: "date",
       expectedType: "date"
     }, {
-      prefs: [["dom.experimental_forms", false], ["dom.forms.datepicker", true],
-              ["dom.forms.datetime", false]],
-      inputType: "date",
-      expectedType: "date"
-    }, {
-      prefs: [["dom.experimental_forms", false], ["dom.forms.datepicker", false],
-              ["dom.forms.datetime", true]],
+      prefs: [["dom.experimental_forms", false], ["dom.forms.datetime", true]],
       inputType: "date",
       expectedType: "date"
     }, {
diff --git a/dom/html/test/forms/test_valueAsDate_pref.html b/dom/html/test/forms/test_valueAsDate_pref.html
index 8518c291b..91e2e1bfc 100644
--- a/dom/html/test/forms/test_valueAsDate_pref.html
+++ b/dom/html/test/forms/test_valueAsDate_pref.html
@@ -12,12 +12,11 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=874640
 
   /** Test for Bug 874640 **/
   var states = [
-  // dom.experimental_forms, dom.forms.datepicker, dom.forms.datetime, expectedValueAsDate
-  [ 'true', 'true', 'true', 'true' ],
-  [ 'true', 'false', 'false', 'true' ],
-  [ 'false', 'true', 'false', 'true' ],
-  [ 'false', 'false', 'true', 'true' ],
-  [ 'false', 'false', 'false', 'false' ],
+  // dom.experimental_forms, dom.forms.datetime, expectedValueAsDate
+  [ 'true', 'true', 'true' ],
+  [ 'true', 'false', 'true' ],
+  [ 'false', 'true', 'true' ],
+  [ 'false', 'false', 'false' ],
         'end'
   ];
 
@@ -33,12 +32,11 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=874640
 
     SpecialPowers.pushPrefEnv({"set":[
       ["dom.experimental_forms", state[0] === 'true'],
-      ["dom.forms.datepicker", state[1] === 'true'],
-      ["dom.forms.datetime", state[2] === 'true']]},
+      ["dom.forms.datetime", state[1] === 'true']]},
       function() {
         iframe.src = 'data:text/html,<script>' +
                  'parent.is("valueAsDate" in document.createElement("input"), ' +
-                 state[3] + ', "valueAsDate presence state should be ' + state[3] + '");' +
+                 state[2] + ', "valueAsDate presence state should be ' + state[2] + '");' +
                  '<\/script>'
      });
   }
diff --git a/dom/ipc/DatePickerParent.cpp b/dom/ipc/DatePickerParent.cpp
deleted file mode 100644
index 509944ddd..000000000
--- a/dom/ipc/DatePickerParent.cpp
+++ /dev/null
@@ -1,87 +0,0 @@
-/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* vim: set ts=8 sts=2 et sw=2 tw=80: */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include "DatePickerParent.h"
-#include "nsComponentManagerUtils.h"
-#include "nsIDocument.h"
-#include "nsIDOMWindow.h"
-#include "mozilla/Unused.h"
-#include "mozilla/dom/Element.h"
-#include "mozilla/dom/TabParent.h"
-
-using mozilla::Unused;
-using namespace mozilla::dom;
-
-NS_IMPL_ISUPPORTS(DatePickerParent::DatePickerShownCallback,
-                  nsIDatePickerShownCallback);
-
-NS_IMETHODIMP
-DatePickerParent::DatePickerShownCallback::Cancel()
-{
-  if (mDatePickerParent) {
-    Unused << mDatePickerParent->SendCancel();
-  }
-  return NS_OK;
-}
-
-NS_IMETHODIMP
-DatePickerParent::DatePickerShownCallback::Done(const nsAString& aDate)
-{
-  if (mDatePickerParent) {
-    Unused << mDatePickerParent->Send__delete__(mDatePickerParent,
-                                                nsString(aDate));
-  }
-  return NS_OK;
-}
-
-void
-DatePickerParent::DatePickerShownCallback::Destroy()
-{
-  mDatePickerParent = nullptr;
-}
-
-bool
-DatePickerParent::CreateDatePicker()
-{
-  mPicker = do_CreateInstance("@mozilla.org/datepicker;1");
-  if (!mPicker) {
-    return false;
-  }
-
-  Element* ownerElement = TabParent::GetFrom(Manager())->GetOwnerElement();
-  if (!ownerElement) {
-    return false;
-  }
-
-  nsCOMPtr<mozIDOMWindowProxy> window = do_QueryInterface(ownerElement->OwnerDoc()->GetWindow());
-  if (!window) {
-    return false;
-  }
-
-  return NS_SUCCEEDED(mPicker->Init(window, mTitle, mInitialDate));
-}
-
-bool
-DatePickerParent::RecvOpen()
-{
-  if (!CreateDatePicker()) {
-    Unused << Send__delete__(this, mInitialDate);
-    return true;
-  }
-
-  mCallback = new DatePickerShownCallback(this);
-
-  mPicker->Open(mCallback);
-  return true;
-};
-
-void
-DatePickerParent::ActorDestroy(ActorDestroyReason aWhy)
-{
-  if (mCallback) {
-    mCallback->Destroy();
-  }
-}
diff --git a/dom/ipc/DatePickerParent.h b/dom/ipc/DatePickerParent.h
deleted file mode 100644
index 73b66f96c..000000000
--- a/dom/ipc/DatePickerParent.h
+++ /dev/null
@@ -1,61 +0,0 @@
-/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* vim: set ts=8 sts=2 et sw=2 tw=80: */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#ifndef mozilla_dom_DatePickerParent_h
-#define mozilla_dom_DatePickerParent_h
-
-#include "mozilla/dom/PDatePickerParent.h"
-#include "nsIDatePicker.h"
-
-namespace mozilla {
-namespace dom {
-
-class DatePickerParent : public PDatePickerParent
-{
- public:
-  DatePickerParent(const nsString& aTitle,
-                   const nsString& aInitialDate)
-  : mTitle(aTitle)
-  , mInitialDate(aInitialDate)
-  {}
-
-  virtual bool RecvOpen() override;
-  virtual void ActorDestroy(ActorDestroyReason aWhy) override;
-
-  class DatePickerShownCallback final
-    : public nsIDatePickerShownCallback
-  {
-  public:
-    explicit DatePickerShownCallback(DatePickerParent* aDatePickerParnet)
-      : mDatePickerParent(aDatePickerParnet)
-    {}
-
-    NS_DECL_ISUPPORTS
-    NS_DECL_NSIDATEPICKERSHOWNCALLBACK
-
-    void Destroy();
-
-  private:
-    ~DatePickerShownCallback() {}
-    DatePickerParent* mDatePickerParent;
-  };
-
- private:
-  virtual ~DatePickerParent() {}
-
-  bool CreateDatePicker();
-
-  RefPtr<DatePickerShownCallback> mCallback;
-  nsCOMPtr<nsIDatePicker> mPicker;
-
-  nsString mTitle;
-  nsString mInitialDate;
-};
-
-} // namespace dom
-} // namespace mozilla
-
-#endif // mozilla_dom_DatePickerParent_h
diff --git a/dom/ipc/PBrowser.ipdl b/dom/ipc/PBrowser.ipdl
index 9dfccbc5c..f09e484ee 100644
--- a/dom/ipc/PBrowser.ipdl
+++ b/dom/ipc/PBrowser.ipdl
@@ -9,7 +9,6 @@ include protocol PBlob;
 include protocol PColorPicker;
 include protocol PContent;
 include protocol PContentBridge;
-include protocol PDatePicker;
 include protocol PDocAccessible;
 include protocol PFilePicker;
 include protocol PIndexedDBPermissionRequest;
@@ -116,7 +115,6 @@ nested(upto inside_cpow) sync protocol PBrowser
     manager PContent or PContentBridge;
 
     manages PColorPicker;
-    manages PDatePicker;
     manages PDocAccessible;
     manages PFilePicker;
     manages PIndexedDBPermissionRequest;
@@ -441,12 +439,6 @@ parent:
      */
     async PColorPicker(nsString title, nsString initialColor);
 
-    /**
-     * Create an asynchronous date picker on the parent side,
-     * but don't open it yet.
-     */
-    async PDatePicker(nsString title, nsString initialDate);
-
     async PFilePicker(nsString aTitle, int16_t aMode);
 
     /**
diff --git a/dom/ipc/PDatePicker.ipdl b/dom/ipc/PDatePicker.ipdl
deleted file mode 100644
index 90a2654bb..000000000
--- a/dom/ipc/PDatePicker.ipdl
+++ /dev/null
@@ -1,27 +0,0 @@
-/* -*- Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 8 -*- */
-/* vim: set sw=4 ts=8 et tw=80 ft=cpp : */
-
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-include protocol PBrowser;
-
-namespace mozilla {
-namespace dom {
-
-protocol PDatePicker
-{
-    manager PBrowser;
-
-parent:
-    async Open();
-
-child:
-    async Cancel();
-
-    async __delete__(nsString color);
-};
-
-} // namespace dom
-} // namespace mozilla
diff --git a/dom/ipc/TabChild.cpp b/dom/ipc/TabChild.cpp
index c8a0c6e3f..705799c54 100644
--- a/dom/ipc/TabChild.cpp
+++ b/dom/ipc/TabChild.cpp
@@ -96,7 +96,6 @@
 #include "LayersLogging.h"
 #include "nsDOMClassInfoID.h"
 #include "nsColorPickerProxy.h"
-#include "nsDatePickerProxy.h"
 #include "nsContentPermissionHelper.h"
 #include "nsPresShell.h"
 #include "nsIAppsService.h"
@@ -2013,21 +2012,6 @@ TabChild::DeallocPColorPickerChild(PColorPickerChild* aColorPicker)
   return true;
 }
 
-PDatePickerChild*
-TabChild::AllocPDatePickerChild(const nsString&, const nsString&)
-{
-  NS_RUNTIMEABORT("unused");
-  return nullptr;
-}
-
-bool
-TabChild::DeallocPDatePickerChild(PDatePickerChild* aDatePicker)
-{
-  nsDatePickerProxy* picker = static_cast<nsDatePickerProxy*>(aDatePicker);
-  NS_RELEASE(picker);
-  return true;
-}
-
 PFilePickerChild*
 TabChild::AllocPFilePickerChild(const nsString&, const int16_t&)
 {
diff --git a/dom/ipc/TabChild.h b/dom/ipc/TabChild.h
index 2232ffeaf..d9988a596 100644
--- a/dom/ipc/TabChild.h
+++ b/dom/ipc/TabChild.h
@@ -451,10 +451,6 @@ public:
 
   virtual bool DeallocPColorPickerChild(PColorPickerChild* aActor) override;
 
-    virtual PDatePickerChild*
-    AllocPDatePickerChild(const nsString& title, const nsString& initialDate) override;
-    virtual bool DeallocPDatePickerChild(PDatePickerChild* actor) override;
-
   virtual PFilePickerChild*
   AllocPFilePickerChild(const nsString& aTitle, const int16_t& aMode) override;
 
diff --git a/dom/ipc/TabParent.cpp b/dom/ipc/TabParent.cpp
index 8e98de3ce..0f190708f 100644
--- a/dom/ipc/TabParent.cpp
+++ b/dom/ipc/TabParent.cpp
@@ -80,7 +80,6 @@
 #include "PermissionMessageUtils.h"
 #include "StructuredCloneData.h"
 #include "ColorPickerParent.h"
-#include "DatePickerParent.h"
 #include "FilePickerParent.h"
 #include "TabChild.h"
 #include "LoadContext.h"
@@ -2424,20 +2423,6 @@ TabParent::DeallocPColorPickerParent(PColorPickerParent* actor)
   return true;
 }
 
-PDatePickerParent*
-TabParent::AllocPDatePickerParent(const nsString& aTitle,
-                                  const nsString& aInitialDate)
-{
-  return new DatePickerParent(aTitle, aInitialDate);
-}
-
-bool
-TabParent::DeallocPDatePickerParent(PDatePickerParent* actor)
-{
-  delete actor;
-  return true;
-}
-
 PRenderFrameParent*
 TabParent::AllocPRenderFrameParent()
 {
diff --git a/dom/ipc/TabParent.h b/dom/ipc/TabParent.h
index 09bb999f3..3624ce320 100644
--- a/dom/ipc/TabParent.h
+++ b/dom/ipc/TabParent.h
@@ -347,10 +347,6 @@ public:
   virtual bool
   DeallocPColorPickerParent(PColorPickerParent* aColorPicker) override;
 
-  virtual PDatePickerParent*
-  AllocPDatePickerParent(const nsString& aTitle, const nsString& aInitialDate) override;
-  virtual bool DeallocPDatePickerParent(PDatePickerParent* aDatePicker) override;
-
   virtual PDocAccessibleParent*
   AllocPDocAccessibleParent(PDocAccessibleParent*, const uint64_t&,
                             const uint32_t&, const IAccessibleHolder&) override;
diff --git a/dom/ipc/moz.build b/dom/ipc/moz.build
index ff3880bc2..71d193d44 100644
--- a/dom/ipc/moz.build
+++ b/dom/ipc/moz.build
@@ -55,7 +55,6 @@ UNIFIED_SOURCES += [
     'ContentProcess.cpp',
     'ContentProcessManager.cpp',
     'CrashReporterParent.cpp',
-    'DatePickerParent.cpp',
     'FilePickerParent.cpp',
     'nsIContentChild.cpp',
     'nsIContentParent.cpp',
@@ -95,7 +94,6 @@ IPDL_SOURCES += [
     'PContentPermissionRequest.ipdl',
     'PCrashReporter.ipdl',
     'PCycleCollectWithLogs.ipdl',
-    'PDatePicker.ipdl',
     'PFilePicker.ipdl',
     'PMemoryReportRequest.ipdl',
     'PPluginWidget.ipdl',
diff --git a/dom/locales/en-US/chrome/layout/HtmlForm.properties b/dom/locales/en-US/chrome/layout/HtmlForm.properties
index 621a0b2b3..82274b2bc 100644
--- a/dom/locales/en-US/chrome/layout/HtmlForm.properties
+++ b/dom/locales/en-US/chrome/layout/HtmlForm.properties
@@ -34,7 +34,6 @@ NoDirSelected=No directory selected.
 # %S will be a number greater or equal to 2.
 XFilesSelected=%S files selected.
 ColorPicker=Choose a color
-DatePicker=Choose a date
 # LOCALIZATION NOTE (AndNMoreFiles): Semi-colon list of plural forms. 
 # See: http://developer.mozilla.org/en/docs/Localization_and_Plurals 
 # This string is shown at the end of the tooltip text for <input type='file'