[DevTools] Use device metrics emulation implemented in content.

Source/core/inspector/InspectorClient.h

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  * 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:
  * 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
@@ skipping 34 matching lines @@
 
     virtual void clearBrowserCache() { }
     virtual void clearBrowserCookies() { }
 
     typedef void (*TraceEventCallback)(char phase, const unsigned char*, const char* name, unsigned long long id,
         int numArgs, const char* const* argNames, const unsigned char* argTypes, const unsigned long long* argValues,
         unsigned char flags);
     virtual void setTraceEventCallback(TraceEventCallback) { }
 
     virtual void overrideDeviceMetrics(int /*width*/, int /*height*/, float /*fontScaleFactor*/, bool /*fitWindow*/) { }
-    virtual void autoZoomPageToFitWidth() { }
 
     virtual bool overridesShowPaintRects() { return false; }
     virtual void setShowPaintRects(bool) { }
     virtual void setShowDebugBorders(bool) { }
     virtual void setShowFPSCounter(bool) { }
     virtual void setContinuousPaintingEnabled(bool) { }
     virtual void setShowScrollBottleneckRects(bool) { }
 
     virtual void getAllocatedObjects(HashSet<const void*>&) { }
     virtual void dumpUncountedAllocatedObjects(const HashMap<const void*, size_t>&) { }
 
     virtual void dispatchKeyEvent(const PlatformKeyboardEvent&) { }
     virtual void dispatchMouseEvent(const PlatformMouseEvent&) { }
 
     static bool doDispatchMessageOnFrontendPage(Page* frontendPage, const String& message);
 
 protected:
     virtual ~InspectorClient() { }
 };
 
 } // namespace WebCore
 
 #endif // !defined(InspectorClient_h)