Don't force recalc if there are no shadow boundary crossing rules

Source/core/inspector/InspectorController.cpp

 /*
  * Copyright (C) 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 270 matching lines @@
 
 void InspectorController::evaluateForTestInFrontend(long callId, const String& script)
 {
     m_isUnderTest = true;
     if (InspectorInspectorAgent* inspectorAgent = m_instrumentingAgents->inspectorInspectorAgent())
         inspectorAgent->evaluateForTestInFrontend(callId, script);
 }
 
 void InspectorController::drawHighlight(GraphicsContext& context) const
 {
-    // https://code.google.com/p/chromium/issues/detail?id=343757
-    DisableCompositingQueryAsserts disabler;
     m_overlay->paint(context);
 }
 
 void InspectorController::getHighlight(Highlight* highlight) const
 {
     m_overlay->getHighlight(highlight);
 }
 
 void InspectorController::inspect(Node* node)
 {
@@ skipping 162 matching lines @@
         timelineAgent->processGPUEvent(InspectorTimelineAgent::GPUEvent(timestamp, phase, foreign, usedGPUMemoryBytes));
 }
 
 void InspectorController::scriptsEnabled(bool  enabled)
 {
     if (InspectorPageAgent* pageAgent = m_instrumentingAgents->inspectorPageAgent())
         pageAgent->scriptsEnabled(enabled);
 }
 
 } // namespace WebCore