[DevTools] Switch from blink-based to content-based touch emulation.

Source/web/WebDevToolsAgentImpl.h

Index: Source/web/WebDevToolsAgentImpl.h
diff --git a/Source/web/WebDevToolsAgentImpl.h b/Source/web/WebDevToolsAgentImpl.h
index 273200181693885cc5f84687f72eb7f0229ee636..b9d8c91807af3c8950315f8d415d351ffedd44b2 100644
--- a/Source/web/WebDevToolsAgentImpl.h
+++ b/Source/web/WebDevToolsAgentImpl.h
@@ -108,6 +108,7 @@ public:
     virtual void clearBrowserCookies() OVERRIDE;
 
     virtual void overrideDeviceMetrics(int width, int height, float deviceScaleFactor, bool emulateViewport, bool fitWindow) OVERRIDE;
+    virtual void setTouchEventEmulationEnabled(bool) OVERRIDE;
 
     virtual void getAllocatedObjects(HashSet<const void*>&) OVERRIDE;
     virtual void dumpUncountedAllocatedObjects(const HashMap<const void*, size_t>&) OVERRIDE;
@@ -144,6 +145,9 @@ private:
     bool m_emulateViewportEnabled;
     bool m_originalViewportEnabled;
     bool m_isOverlayScrollbarsEnabled;
+    bool m_touchEventEmulationEnabled;
+    bool m_originalTouchEnabled;
+    bool m_originalDeviceSupportsMouse;
     typedef Vector<RefPtr<WebCore::JSONObject> > FrontendMessageQueue;
     FrontendMessageQueue m_frontendMessageQueue;
 };