Bug 1174461 - [e10s] Return a cached result from SendGetNativePluginPort (r=jimm) a=kwierso

MozReview-Commit-ID: FyeWtg0Py5p

--HG--
extra : source : 0f2e90feea3b779e6b8cc8ca572c6313e1d0995e

widget/PluginWidgetProxy.cpp

@@ -35,7 +35,8 @@ NS_IMPL_ISUPPORTS_INHERITED(PluginWidgetProxy, PuppetWidget, nsIWidget)
 PluginWidgetProxy::PluginWidgetProxy(dom::TabChild* aTabChild,
                                      mozilla::plugins::PluginWidgetChild* aActor) :
   PuppetWidget(aTabChild),
-  mActor(aActor)
+  mActor(aActor),
+  mCachedPluginPort(0)
 {
   // See ChannelDestroyed() in the header
   mActor->SetWidget(this);
@@ -63,6 +64,7 @@ PluginWidgetProxy::Create(nsIWidget* aParent,
   }
 
   BaseCreate(aParent, aInitData);
+  mParent = aParent;
 
   mBounds = aRect;
   mEnabled = true;
@@ -74,8 +76,6 @@ PluginWidgetProxy::Create(nsIWidget* aParent,
 NS_IMETHODIMP
 PluginWidgetProxy::SetParent(nsIWidget* aNewParent)
 {
-  mParent = aNewParent;
-
   nsCOMPtr<nsIWidget> kungFuDeathGrip(this);
   nsIWidget* parent = GetParent();
   if (parent) {
@@ -84,6 +84,7 @@ PluginWidgetProxy::SetParent(nsIWidget* aNewParent)
   if (aNewParent) {
     aNewParent->AddChild(this);
   }
+  mParent = aNewParent;
   return NS_OK;
 }
 
@@ -135,10 +136,14 @@ PluginWidgetProxy::GetNativeData(uint32_t aDataType)
       NS_WARNING("PluginWidgetProxy::GetNativeData received request for unsupported data type.");
       return nullptr;
   }
-  uintptr_t value = 0;
-  mActor->SendGetNativePluginPort(&value);
-  PWLOG("PluginWidgetProxy::GetNativeData %p\n", (void*)value);
-  return (void*)value;
+  // The parent side window handle or xid never changes so we can
+  // cache this for our lifetime.
+  if (mCachedPluginPort) {
+    return (void*)mCachedPluginPort;
+  }
+  mActor->SendGetNativePluginPort(&mCachedPluginPort);
+  PWLOG("PluginWidgetProxy::GetNativeData %p\n", (void*)mCachedPluginPort);
+  return (void*)mCachedPluginPort;
 }
 
 #if defined(XP_WIN)

widget/PluginWidgetProxy.h

@@ -67,6 +67,7 @@ private:
   // PuppetWidget does not implement parent apis, but we need
   // them for plugin widgets.
   nsCOMPtr<nsIWidget> mParent;
+  uintptr_t mCachedPluginPort;
 };
 
 } // namespace widget

widget/nsBaseWidget.cpp

@@ -592,15 +592,15 @@ double nsIWidget::DefaultScaleOverride()
 //-------------------------------------------------------------------------
 void nsBaseWidget::AddChild(nsIWidget* aChild)
 {
-  NS_PRECONDITION(!aChild->GetNextSibling() && !aChild->GetPrevSibling(),
-                  "aChild not properly removed from its old child list");
+  MOZ_RELEASE_ASSERT(!aChild->GetNextSibling() && !aChild->GetPrevSibling(),
+                     "aChild not properly removed from its old child list");
 
   if (!mFirstChild) {
     mFirstChild = mLastChild = aChild;
   } else {
     // append to the list
-    NS_ASSERTION(mLastChild, "Bogus state");
-    NS_ASSERTION(!mLastChild->GetNextSibling(), "Bogus state");
+    MOZ_RELEASE_ASSERT(mLastChild);
+    MOZ_RELEASE_ASSERT(!mLastChild->GetNextSibling());
     mLastChild->SetNextSibling(aChild);
     aChild->SetPrevSibling(mLastChild);
     mLastChild = aChild;
@@ -622,7 +622,7 @@ void nsBaseWidget::RemoveChild(nsIWidget* aChild)
   nsIWidget* parent = aChild->GetParent();
   NS_ASSERTION(!parent || parent == this, "Not one of our kids!");
 #else
-  NS_ASSERTION(aChild->GetParent() == this, "Not one of our kids!");
+  MOZ_RELEASE_ASSERT(aChild->GetParent() == this, "Not one of our kids!");
 #endif
 #endif