1 files changed, 29 insertions, 41 deletions

diff --git a/dom/html/HTMLSelectElement.cpp b/dom/html/HTMLSelectElement.cpp
index 9ba0a1efe..36dac0852 100644
--- a/dom/html/HTMLSelectElement.cpp
+++ b/dom/html/HTMLSelectElement.cpp
@@ -1269,12 +1269,25 @@ HTMLSelectElement::UnbindFromTree(bool aDeep, bool aNullParent)
 
 nsresult
 HTMLSelectElement::BeforeSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
-                                 nsAttrValueOrString* aValue,
+                                 const nsAttrValueOrString* aValue,
                                  bool aNotify)
 {
-  if (aNotify && aName == nsGkAtoms::disabled &&
-      aNameSpaceID == kNameSpaceID_None) {
-    mDisabledChanged = true;
+  if (aNameSpaceID == kNameSpaceID_None) {
+    if (aName == nsGkAtoms::disabled) {
+      if (aNotify) {
+        mDisabledChanged = true;
+      }
+    } else if (aName == nsGkAtoms::multiple) {
+      if (!aValue && aNotify && mSelectedIndex >= 0) {
+        // We're changing from being a multi-select to a single-select.
+        // Make sure we only have one option selected before we do that.
+        // Note that this needs to come before we really unset the attr,
+        // since SetOptionsSelectedByIndex does some bail-out type
+        // optimization for cases when the select is not multiple that
+        // would lead to only a single option getting deselected.
+        SetSelectedIndexInternal(mSelectedIndex, aNotify);
+      }
+    }
   }
 
   return nsGenericHTMLFormElementWithState::BeforeSetAttr(aNameSpaceID, aName,
@@ -1283,7 +1296,8 @@ HTMLSelectElement::BeforeSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
 
 nsresult
 HTMLSelectElement::AfterSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
-                                const nsAttrValue* aValue, bool aNotify)
+                                const nsAttrValue* aValue,
+                                const nsAttrValue* aOldValue, bool aNotify)
 {
   if (aNameSpaceID == kNameSpaceID_None) {
     if (aName == nsGkAtoms::disabled) {
@@ -1293,44 +1307,18 @@ HTMLSelectElement::AfterSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
     } else if (aName == nsGkAtoms::autocomplete) {
       // Clear the cached @autocomplete attribute state
       mAutocompleteAttrState = nsContentUtils::eAutocompleteAttrState_Unknown;
+    } else if (aName == nsGkAtoms::multiple) {
+      if (!aValue && aNotify) {
+        // We might have become a combobox; make sure _something_ gets
+        // selected in that case
+        CheckSelectSomething(aNotify);
+      }
     }
-
-    UpdateState(aNotify);
   }
 
   return nsGenericHTMLFormElementWithState::AfterSetAttr(aNameSpaceID, aName,
-                                                         aValue, aNotify);
-}
-
-nsresult
-HTMLSelectElement::UnsetAttr(int32_t aNameSpaceID, nsIAtom* aAttribute,
-                             bool aNotify)
-{
-  if (aNotify && aNameSpaceID == kNameSpaceID_None &&
-      aAttribute == nsGkAtoms::multiple) {
-    // We're changing from being a multi-select to a single-select.
-    // Make sure we only have one option selected before we do that.
-    // Note that this needs to come before we really unset the attr,
-    // since SetOptionsSelectedByIndex does some bail-out type
-    // optimization for cases when the select is not multiple that
-    // would lead to only a single option getting deselected.
-    if (mSelectedIndex >= 0) {
-      SetSelectedIndexInternal(mSelectedIndex, aNotify);
-    }
-  }
-
-  nsresult rv = nsGenericHTMLFormElementWithState::UnsetAttr(aNameSpaceID, aAttribute,
-                                                             aNotify);
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  if (aNotify && aNameSpaceID == kNameSpaceID_None &&
-      aAttribute == nsGkAtoms::multiple) {
-    // We might have become a combobox; make sure _something_ gets
-    // selected in that case
-    CheckSelectSomething(aNotify);
-  }
-
-  return rv;
+                                                         aValue, aOldValue,
+                                                         aNotify);
 }
 
 void
@@ -1442,14 +1430,14 @@ HTMLSelectElement::IsDisabledForEvents(EventMessage aMessage)
 }
 
 nsresult
-HTMLSelectElement::PreHandleEvent(EventChainPreVisitor& aVisitor)
+HTMLSelectElement::GetEventTargetParent(EventChainPreVisitor& aVisitor)
 {
   aVisitor.mCanHandle = false;
   if (IsDisabledForEvents(aVisitor.mEvent->mMessage)) {
     return NS_OK;
   }
 
-  return nsGenericHTMLFormElementWithState::PreHandleEvent(aVisitor);
+  return nsGenericHTMLFormElementWithState::GetEventTargetParent(aVisitor);
 }
 
 nsresult