Move scroll event handlers from layer to layer tree view.

third_party/WebKit/Source/web/tests/ScrollingCoordinatorTest.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 303 matching lines @@
 
     ASSERT_TRUE(webLayerTreeView()->haveWheelEventHandlers());
 }
 
 TEST_F(ScrollingCoordinatorTest, scrollEventHandler)
 {
     registerMockedHttpURLLoad("scroll-event-handler.html");
     navigateTo(m_baseURL + "scroll-event-handler.html");
     forceFullCompositingUpdate();
 
-    WebLayer* rootScrollLayer = getRootScrollLayer();
-    ASSERT_TRUE(rootScrollLayer->haveScrollEventHandlers());
+    ASSERT_TRUE(webLayerTreeView()->haveScrollEventHandlers());
 }
 
 TEST_F(ScrollingCoordinatorTest, updateEventHandlersDuringTeardown)
 {
     registerMockedHttpURLLoad("scroll-event-handler-window.html");
     navigateTo(m_baseURL + "scroll-event-handler-window.html");
     forceFullCompositingUpdate();
 
     // Simulate detaching the document from its DOM window. This should not
     // cause a crash when the WebViewImpl is closed by the test runner.
@@ skipping 262 matching lines @@
     EXPECT_FALSE(scrollLayer->shouldScrollOnMainThread());
 
     fixedPos->setInlineStyleProperty(CSSPropertyTransform, CSSValueNone);
     forceFullCompositingUpdate();
 
     EXPECT_FALSE(static_cast<LayoutBoxModelObject*>(fixedPos->layoutObject())->layer()->hasCompositedLayerMapping());
     EXPECT_TRUE(scrollLayer->shouldScrollOnMainThread());
 }
 
 } // namespace blink