DevTools: control touch emulation from the browser side only.

content/browser/devtools/renderer_overrides_handler.h

Index: content/browser/devtools/renderer_overrides_handler.h
diff --git a/content/browser/devtools/renderer_overrides_handler.h b/content/browser/devtools/renderer_overrides_handler.h
index 774a6838cb8157e02467f728f8f17ae4a76097c4..dd277ccaa931231f4f56f5a8be28820bbdbe6856 100644
--- a/content/browser/devtools/renderer_overrides_handler.h
+++ b/content/browser/devtools/renderer_overrides_handler.h
@@ -40,7 +40,6 @@ class CONTENT_EXPORT RendererOverridesHandler
   void OnVisibilityChanged(bool visible);
   void SetRenderViewHost(RenderViewHostImpl* host);
   void ClearRenderViewHost();
-  bool OnSetTouchEventEmulationEnabled();
 
  private:
   void InnerSwapCompositorFrame();
@@ -69,6 +68,8 @@ class CONTENT_EXPORT RendererOverridesHandler
       scoped_refptr<DevToolsProtocol::Command> command);
   scoped_refptr<DevToolsProtocol::Response> PageNavigateToHistoryEntry(
       scoped_refptr<DevToolsProtocol::Command> command);
+  scoped_refptr<DevToolsProtocol::Response> PageSetTouchEmulationEnabled(
+      scoped_refptr<DevToolsProtocol::Command> command);
   scoped_refptr<DevToolsProtocol::Response> PageCaptureScreenshot(
       scoped_refptr<DevToolsProtocol::Command> command);
   scoped_refptr<DevToolsProtocol::Response> PageCanScreencast(
@@ -102,12 +103,15 @@ class CONTENT_EXPORT RendererOverridesHandler
   scoped_refptr<DevToolsProtocol::Response> InputEmulateTouchFromMouseEvent(
       scoped_refptr<DevToolsProtocol::Command> command);
 
+  void SetTouchEventEmulationEnabled(bool enabled);
+
   RenderViewHostImpl* host_;
   scoped_refptr<DevToolsProtocol::Command> screencast_command_;
   bool has_last_compositor_frame_metadata_;
   cc::CompositorFrameMetadata last_compositor_frame_metadata_;
   base::TimeTicks last_frame_time_;
   int capture_retry_count_;
+  bool touch_emulation_enabled_;
   base::WeakPtrFactory<RendererOverridesHandler> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(RendererOverridesHandler);
 };