3 files changed, 13 insertions, 11 deletions
diff --git a/widget/windows/nsLookAndFeel.cpp b/widget/windows/nsLookAndFeel.cpp
index 97f81abfd..a907622d9 100644
--- a/widget/windows/nsLookAndFeel.cpp
+++ b/widget/windows/nsLookAndFeel.cpp
@@ -11,7 +11,6 @@
 #include "nsUXThemeConstants.h"
 #include "gfxFont.h"
 #include "WinUtils.h"
-#include "mozilla/Telemetry.h"
 #include "mozilla/WindowsVersion.h"
 #include "gfxFontConstants.h"
 
@@ -65,8 +64,6 @@ nsLookAndFeel::nsLookAndFeel()
   : nsXPLookAndFeel()
   , mUseAccessibilityTheme(0)
 {
-  mozilla::Telemetry::Accumulate(mozilla::Telemetry::TOUCH_ENABLED_DEVICE,
-                                 WinUtils::IsTouchDeviceSupportPresent());
 }
 
 nsLookAndFeel::~nsLookAndFeel()
diff --git a/widget/windows/nsNativeThemeWin.cpp b/widget/windows/nsNativeThemeWin.cpp
index 8950dcf90..475ebce94 100644
--- a/widget/windows/nsNativeThemeWin.cpp
+++ b/widget/windows/nsNativeThemeWin.cpp
@@ -1360,7 +1360,10 @@ nsNativeThemeWin::GetThemePartAndState(nsIFrame* aFrame, uint8_t aWidgetType,
 static bool
 AssumeThemePartAndStateAreTransparent(int32_t aPart, int32_t aState)
 {
-  if (aPart == MENU_POPUPITEM && aState == MBI_NORMAL) {
+  // When using a high contrast theme on Windows 8 or later, we can't
+  // use this optimization.
+  if (!(IsWin8OrLater() && nsUXThemeData::IsHighContrastOn()) &&
+      aPart == MENU_POPUPITEM && aState == MBI_NORMAL) {
     return true;
   }
   return false;
diff --git a/widget/windows/nsWindow.cpp b/widget/windows/nsWindow.cpp
index b2bb59bd3..122d18686 100644
--- a/widget/windows/nsWindow.cpp
+++ b/widget/windows/nsWindow.cpp
@@ -366,6 +366,9 @@ static const int32_t kResizableBorderMinSize = 3;
 // Cached pointer events enabler value, True if pointer events are enabled.
 static bool gIsPointerEventsEnabled = false;
 
+// Cached scroll outside menu enabler value, True if scrolling is allowed.
+static bool gIsScrollingOutsideEnabled = false;
+
 // We should never really try to accelerate windows bigger than this. In some
 // cases this might lead to no D3D9 acceleration where we could have had it
 // but D3D9 does not reliably report when it supports bigger windows. 8192
@@ -665,6 +668,10 @@ nsWindow::nsWindow()
     Preferences::AddBoolVarCache(&gIsPointerEventsEnabled,
                                  "dom.w3c_pointer_events.enabled",
                                  gIsPointerEventsEnabled);
+    Preferences::AddBoolVarCache(&gIsScrollingOutsideEnabled,
+                                 "ui.menu.allow_content_scroll",
+                                 gIsScrollingOutsideEnabled);
+                                 
   } // !sInstanceCount
 
   mIdleService = nullptr;
@@ -4225,10 +4232,6 @@ nsWindow::DispatchMouseEvent(EventMessage aEventMessage, WPARAM wParam,
   }
 
   if (WinUtils::GetIsMouseFromTouch(aEventMessage)) {
-    if (aEventMessage == eMouseDown) {
-      Telemetry::Accumulate(Telemetry::FX_TOUCH_USED, 1);
-    }
-
     if (mTouchWindow) {
       // If mTouchWindow is true, then we must have APZ enabled and be
       // feeding it raw touch events. In that case we don't need to
@@ -6743,8 +6746,6 @@ bool nsWindow::OnGesture(WPARAM wParam, LPARAM lParam)
     bool endFeedback = true;
 
     if (mGesture.PanDeltaToPixelScroll(wheelEvent)) {
-      mozilla::Telemetry::Accumulate(mozilla::Telemetry::SCROLL_INPUT_METHODS,
-          (uint32_t) ScrollInputMethod::MainThreadTouch);
       DispatchEvent(&wheelEvent, status);
     }
 
@@ -7703,7 +7704,8 @@ nsWindow::DealWithPopups(HWND aWnd, UINT aMessage,
           break;
         }
       }
-      return consumeRollupEvent;
+      // Consume event if appropriate unless overridden.
+      return consumeRollupEvent && !gIsScrollingOutsideEnabled;
 
     case WM_ACTIVATEAPP:
       break;