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 e960868969c61d7ff3a3378a5b243e349949ccf3..429f52066ea6465ad21174364aa1ab8c10034d1b 100644
--- a/Source/core/frame/Frame.cpp
+++ b/Source/core/frame/Frame.cpp
@@ -37,7 +37,6 @@
 #include "core/frame/Settings.h"
 #include "core/html/HTMLFrameElementBase.h"
 #include "core/inspector/InspectorInstrumentation.h"
-#include "core/layout/Layer.h"
 #include "core/loader/EmptyClients.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/page/Chrome.h"
@@ -46,8 +45,6 @@
 #include "core/page/FocusController.h"
 #include "core/page/Page.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());