Cleanup RemotePlatformLayer when disconnecting RemoteFrame.

Source/core/frame/Frame.cpp

Index: Source/core/frame/Frame.cpp
diff --git a/Source/core/frame/Frame.cpp b/Source/core/frame/Frame.cpp
index c84121d3b075c7109510c707480acadf2d4fef66..429f52066ea6465ad21174364aa1ab8c10034d1b 100644
--- a/Source/core/frame/Frame.cpp
+++ b/Source/core/frame/Frame.cpp
@@ -44,10 +44,7 @@
 #include "core/page/EventHandler.h"
 #include "core/page/FocusController.h"
 #include "core/page/Page.h"
-#include "core/rendering/RenderLayer.h"
 #include "core/rendering/RenderPart.h"
-#include "platform/graphics/GraphicsLayer.h"
-#include "public/platform/WebLayer.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/RefCountedLeakCounter.h"
 
@@ -264,20 +261,6 @@ RenderPart* Frame::ownerRenderer() const
     return toRenderPart(object);
 }
 
-void Frame::setRemotePlatformLayer(WebLayer* layer)
-{
-    if (m_remotePlatformLayer)
-        GraphicsLayer::unregisterContentsLayer(m_remotePlatformLayer);
-    m_remotePlatformLayer = layer;
-    if (m_remotePlatformLayer)
-        GraphicsLayer::registerContentsLayer(layer);
-
-    ASSERT(owner());
-    toHTMLFrameOwnerElement(owner())->setNeedsCompositingUpdate();
-    if (RenderPart* renderer = ownerRenderer())
-        renderer->layer()->updateSelfPaintingLayer();
-}
-
 Settings* Frame::settings() const
 {
     if (m_host)
@@ -290,7 +273,6 @@ Frame::Frame(FrameClient* client, FrameHost* host, FrameOwner* owner)
     , m_host(host)
     , m_owner(owner)
     , m_client(client)
-    , m_remotePlatformLayer(nullptr)
     , m_isLoading(false)
 {
     ASSERT(page());