Removed ScrollingCoordinator and a bunch of composited scrolling'

sky/engine/core/rendering/RenderLayer.cpp

Index: sky/engine/core/rendering/RenderLayer.cpp
diff --git a/sky/engine/core/rendering/RenderLayer.cpp b/sky/engine/core/rendering/RenderLayer.cpp
index 1b896c4fa5ef8c5374224b289daa06f166c9eb8f..03f52f339d52bed5ccd1ea1c2f827b4651b38c35 100644
--- a/sky/engine/core/rendering/RenderLayer.cpp
+++ b/sky/engine/core/rendering/RenderLayer.cpp
@@ -51,7 +51,6 @@
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
 #include "core/page/Page.h"
-#include "core/page/scrolling/ScrollingCoordinator.h"
 #include "core/rendering/FilterEffectRenderer.h"
 #include "core/rendering/HitTestRequest.h"
 #include "core/rendering/HitTestResult.h"
@@ -127,11 +126,6 @@ RenderLayer::RenderLayer(RenderLayerModelObject* renderer, LayerType type)
 
 RenderLayer::~RenderLayer()
 {
-    if (renderer()->frame() && renderer()->frame()->page()) {
-        if (ScrollingCoordinator* scrollingCoordinator = renderer()->frame()->page()->scrollingCoordinator())
-            scrollingCoordinator->willDestroyRenderLayer(this);
-    }
-
     removeFilterInfoIfNeeded();
 
     if (groupedMapping()) {
@@ -2334,18 +2328,6 @@ GraphicsLayer* RenderLayer::graphicsLayerBacking() const
     }
 }
 
-GraphicsLayer* RenderLayer::graphicsLayerBackingForScrolling() const
-{
-    switch (compositingState()) {
-    case NotComposited:
-        return 0;
-    case PaintsIntoGroupedBacking:
-        return groupedMapping()->squashingLayer();
-    default:
-        return compositedLayerMapping()->scrollingContentsLayer() ? compositedLayerMapping()->scrollingContentsLayer() : compositedLayerMapping()->mainGraphicsLayer();
-    }
-}
-
 CompositedLayerMapping* RenderLayer::ensureCompositedLayerMapping()
 {
     if (!m_compositedLayerMapping) {