Backed out changeset 0a9ecb630db6 (bug 1234121) for Marionette-e10s crashes on Linux in test_accessibility.py TestAccessibility.test_click_raises_no_exceptions. r=backout on a CLOSED TREE

accessible/base/FocusManager.cpp

@@ -27,6 +27,46 @@ FocusManager::~FocusManager()
 {
 }
 
+Accessible*
+FocusManager::FocusedAccessible() const
+{
+  if (mActiveItem)
+    return mActiveItem;
+
+  nsINode* focusedNode = FocusedDOMNode();
+  if (focusedNode) {
+    DocAccessible* doc = 
+      GetAccService()->GetDocAccessible(focusedNode->OwnerDoc());
+    return doc ? doc->GetAccessibleEvenIfNotInMapOrContainer(focusedNode) : nullptr;
+  }
+
+  return nullptr;
+}
+
+bool
+FocusManager::IsFocused(const Accessible* aAccessible) const
+{
+  if (mActiveItem)
+    return mActiveItem == aAccessible;
+
+  nsINode* focusedNode = FocusedDOMNode();
+  if (focusedNode) {
+    // XXX: Before getting an accessible for node having a DOM focus make sure
+    // they belong to the same document because it can trigger unwanted document
+    // accessible creation for temporary about:blank document. Without this
+    // peculiarity we would end up with plain implementation based on
+    // FocusedAccessible() method call. Make sure this issue is fixed in
+    // bug 638465.
+    if (focusedNode->OwnerDoc() == aAccessible->GetNode()->OwnerDoc()) {
+      DocAccessible* doc = 
+        GetAccService()->GetDocAccessible(focusedNode->OwnerDoc());
+      return aAccessible ==
+        (doc ? doc->GetAccessibleEvenIfNotInMapOrContainer(focusedNode) : nullptr);
+    }
+  }
+  return false;
+}
+
 bool
 FocusManager::IsFocusWithin(const Accessible* aContainer) const
 {
@@ -153,23 +193,9 @@ FocusManager::ActiveItemChanged(Accessible* aItem, bool aCheckIfActive)
   // If active item is changed then fire accessible focus event on it, otherwise
   // if there's no an active item then fire focus event to accessible having
   // DOM focus.
-  Accessible* target = nullptr;
-  if (aItem) {
-    target = aItem;
-  } else {
-    nsINode* focusedNode = FocusedDOMNode();
-    if (focusedNode) {
-      DocAccessible* doc =
-        GetAccService()->GetDocAccessible(focusedNode->OwnerDoc());
-      if (doc) {
-        target = doc->GetAccessibleEvenIfNotInMapOrContainer(focusedNode);
-      }
-    }
-  }
-
-  if (target) {
+  Accessible* target = FocusedAccessible();
+  if (target)
     DispatchFocusEvent(target->Document(), target);
-  }
 }
 
 void
@@ -270,9 +296,6 @@ FocusManager::ProcessFocusEvent(AccEvent* aEvent)
     }
   }
 
-  mFocusedAcc = target;
-  mFocusedProxy = nullptr;
-
   // Fire menu start/end events for ARIA menus.
   if (target->IsARIARole(nsGkAtoms::menuitem)) {
     // The focus was moved into menu.

accessible/base/FocusManager.h

@@ -16,7 +16,6 @@ namespace a11y {
 
 class AccEvent;
 class Accessible;
-class ProxyAccessible;
 class DocAccessible;
 
 /**
@@ -30,18 +29,13 @@ public:
   /**
    * Return a focused accessible.
    */
-  Accessible* FocusedAccessible() const { return mFocusedAcc; }
-
-  /**
-   * Return remote focused accessible.
-   */
-  ProxyAccessible* FocusedRemoteAccessible() const { return mFocusedProxy; }
+  Accessible* FocusedAccessible() const;
 
   /**
    * Return true if given accessible is focused.
    */
-  bool IsFocused(const Accessible* aAccessible) const
-    { return aAccessible == mFocusedAcc; }
+  bool IsFocused(const Accessible* aAccessible) const;
+
   /**
    * Return true if the given accessible is an active item, i.e. an item that
    * is current within the active widget.
@@ -91,11 +85,6 @@ public:
    */
   void ActiveItemChanged(Accessible* aItem, bool aCheckIfActive = true);
 
-  /**
-   * Called when focused item in child process is changed.
-   */
-  void RemoteFocusChanged(ProxyAccessible* aProxy) { mFocusedProxy = aProxy; }
-
   /**
    * Dispatch delayed focus event for the current focus accessible.
    */
@@ -135,8 +124,6 @@ private:
   nsIDocument* FocusedDOMDocument() const;
 
 private:
-  RefPtr<Accessible> mFocusedAcc;
-  ProxyAccessible* mFocusedProxy;
   RefPtr<Accessible> mActiveItem;
   RefPtr<Accessible> mActiveARIAMenubar;
 };

accessible/ipc/DocAccessibleChild.cpp

@@ -1888,6 +1888,24 @@ DocAccessibleChild::RecvEmbeddedChildAt(const uint64_t& aID,
   return true;
 }
 
+bool
+DocAccessibleChild::RecvFocusedChild(const uint64_t& aID,
+                                       uint64_t* aChild,
+                                       bool* aOk)
+{
+  *aChild = 0;
+  *aOk = false;
+  Accessible* acc = IdToAccessible(aID);
+  if (acc) {
+    Accessible* child = acc->FocusedChild();
+    if (child) {
+      *aChild = reinterpret_cast<uint64_t>(child->UniqueID());
+      *aOk = true;
+    }
+  }
+  return true;
+}
+
 bool
 DocAccessibleChild::RecvLanguage(const uint64_t& aID,
                                  nsString* aLocale)

accessible/ipc/DocAccessibleChild.h

@@ -464,6 +464,10 @@ public:
   virtual bool RecvEmbeddedChildAt(const uint64_t& aID, const uint32_t& aIdx,
                                    uint64_t* aChildID) override final;
 
+  virtual bool RecvFocusedChild(const uint64_t& aID,
+                                uint64_t* aChild,
+                                bool* aOk) override;
+
   virtual bool RecvLanguage(const uint64_t& aID, nsString* aLocale) override;
   virtual bool RecvDocType(const uint64_t& aID, nsString* aType) override;
   virtual bool RecvTitle(const uint64_t& aID, nsString* aTitle) override;

accessible/ipc/DocAccessibleParent.cpp

@@ -147,14 +147,6 @@ DocAccessibleParent::RecvEvent(const uint64_t& aID, const uint32_t& aEventType)
     return true;
   }
 
-  switch(aEventType) {
-      case nsIAccessibleEvent::EVENT_FOCUS:
-          FocusMgr()->RemoteFocusChanged(proxy);
-          break;
-      default:
-        break;
-  }
-
   ProxyEvent(proxy, aEventType);
 
   if (!nsCoreUtils::AccEventObserversExist()) {

accessible/ipc/PDocAccessible.ipdl

@@ -242,6 +242,8 @@ child:
     returns(uint32_t childIdx);
   prio(high) sync EmbeddedChildAt(uint64_t aID, uint32_t aChildIdx)
     returns(uint64_t aChild);
+  prio(high) sync FocusedChild(uint64_t aID)
+    returns(uint64_t aChild, bool aOk);
 
   prio(high) sync Language(uint64_t aID) returns(nsString aLocale);
   prio(high) sync DocType(uint64_t aID) returns(nsString aType);

accessible/ipc/ProxyAccessible.cpp

@@ -1068,16 +1068,10 @@ ProxyAccessible::EmbeddedChildAt(size_t aChildIdx)
 ProxyAccessible*
 ProxyAccessible::FocusedChild()
 {
-  ProxyAccessible* focus = FocusMgr()->FocusedRemoteAccessible();
-  if (IsDoc()) {
-      return focus;
-  }
-
-  if (focus && (focus == this || focus->Parent() == this)) {
-    return focus;
-  }
-
-  return nullptr;
+  uint64_t childID = 0;
+  bool ok = false;
+  Unused << mDoc->SendFocusedChild(mID, &childID, &ok);
+  return ok ? mDoc->GetAccessible(childID) : nullptr;
 }
 
 ProxyAccessible*