Change PaintLayer::m_layoutObject to a reference.

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "bindings/core/v8/ScriptController.h"
 #include "bindings/core/v8/ScriptSourceCode.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
@@ skipping 64 matching lines @@
     testing::runPendingTasks();
     return displayItems;
   }
 
   // Number of rectangles that make up the root layer's touch handler region.
   size_t touchHandlerRegionSize() {
     size_t result = 0;
     PaintLayer* layer =
         webView().mainFrameImpl()->frame()->contentLayoutObject()->layer();
     GraphicsLayer* ownGraphicsLayer =
-        layer->graphicsLayerBacking(layer->layoutObject());
+        layer->graphicsLayerBacking(&layer->layoutObject());
     if (ownGraphicsLayer) {
       result +=
           ownGraphicsLayer->platformLayer()->touchEventHandlerRegion().size();
     }
     GraphicsLayer* childGraphicsLayer = layer->graphicsLayerBacking();
     if (childGraphicsLayer && childGraphicsLayer != ownGraphicsLayer) {
       result +=
           childGraphicsLayer->platformLayer()->touchEventHandlerRegion().size();
     }
     return result;
@@ skipping 949 matching lines @@
   compositeFrame();
   EXPECT_TRUE(frameDocument->view()->canThrottleRendering());
 
   // Setting display:none unthrottles the frame.
   frameElement->setAttribute(styleAttr, "display: none");
   compositeFrame();
   EXPECT_FALSE(frameDocument->view()->canThrottleRendering());
 }
 
 }  // namespace blink