[DevTools] Use device metrics emulation implemented in content.

Source/web/InspectorClientImpl.cpp

Index: Source/web/InspectorClientImpl.cpp
diff --git a/Source/web/InspectorClientImpl.cpp b/Source/web/InspectorClientImpl.cpp
index ac4dcebb4651155d11cd1e9968953f099a465562..2a28de6a5dbb773f1520504e1cc59ed2191dd323 100644
--- a/Source/web/InspectorClientImpl.cpp
+++ b/Source/web/InspectorClientImpl.cpp
@@ -102,12 +102,6 @@ void InspectorClientImpl::overrideDeviceMetrics(int width, int height, float fon
         agent->overrideDeviceMetrics(width, height, fontScaleFactor, fitWindow);
 }
 
-void InspectorClientImpl::autoZoomPageToFitWidth()
-{
-    if (WebDevToolsAgentImpl* agent = devToolsAgent())
-        agent->autoZoomPageToFitWidth();
-}
-
 bool InspectorClientImpl::overridesShowPaintRects()
 {
     return m_inspectedWebView->isAcceleratedCompositingActive();