[Slimming Paint] Paint the inspector overlay with GraphicsLayer DisplayList.

Source/web/WebDevToolsAgentImpl.cpp

 /*
  * Copyright (C) 2010-2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 468 matching lines @@
     return 0;
 }
 
 LocalFrame* WebDevToolsAgentImpl::mainFrame()
 {
     if (Page* page = m_webViewImpl->page())
         return page->deprecatedLocalMainFrame();
     return 0;
 }
 
-// WebPageOverlay
-void WebDevToolsAgentImpl::paintPageOverlay(WebCanvas* canvas)
+// PageOverlay::Painter
+void WebDevToolsAgentImpl::paintPageOverlay(GraphicsContext& context)
 {
-    InspectorController* ic = inspectorController();
-    if (ic) {
-        OwnPtr<GraphicsContext> graphicsContext;
-        OwnPtr<DisplayItemList> displayItemList;
-        if (RuntimeEnabledFeatures::slimmingPaintEnabled()) {
-            displayItemList = DisplayItemList::create();
-            graphicsContext = adoptPtr(new GraphicsContext(nullptr, displayItemList.get()));
-        } else {
-            graphicsContext = adoptPtr(new GraphicsContext(canvas, nullptr));
-        }
-
-        graphicsContext->setCertainlyOpaque(false);
-        ic->drawHighlight(*graphicsContext);
-
-        if (RuntimeEnabledFeatures::slimmingPaintEnabled()) {
-            GraphicsContext context(canvas, nullptr);
-            displayItemList->replay(&context);
-        }
-    }
+    if (InspectorController* ic = inspectorController())
+        ic->drawHighlight(context);
 }
 
 void WebDevToolsAgentImpl::highlight()
 {
     m_webViewImpl->addPageOverlay(this, OverlayZOrders::highlight);
 }
 
 void WebDevToolsAgentImpl::hideHighlight()
 {
     m_webViewImpl->removePageOverlay(this);
@@ skipping 92 matching lines @@
         || commandName == InspectorBackendDispatcher::commandName(InspectorBackendDispatcher::kDebugger_removeBreakpointCmd)
         || commandName == InspectorBackendDispatcher::commandName(InspectorBackendDispatcher::kDebugger_setBreakpointsActiveCmd);
 }
 
 void WebDevToolsAgent::processPendingMessages()
 {
     PageScriptDebugServer::shared().runPendingTasks();
 }
 
 } // namespace blink