Add content::RenderWidgetHost::MouseEventCallback

content/public/browser/render_widget_host.h

Index: content/public/browser/render_widget_host.h
diff --git a/content/public/browser/render_widget_host.h b/content/public/browser/render_widget_host.h
index ae513b644a0bbb296134cbf64f2e969c19d1da80..a70026663f86b542391e03f125ac9fe18de5b023 100644
--- a/content/public/browser/render_widget_host.h
+++ b/content/public/browser/render_widget_host.h
@@ -28,6 +28,7 @@ class Rect;
 }
 
 namespace WebKit {
+class WebMouseEvent;
 struct WebScreenInfo;
 }
 
@@ -296,6 +297,11 @@ class CONTENT_EXPORT RenderWidgetHost : public IPC::Sender {
   virtual void RemoveKeyPressEventCallback(
       const KeyPressEventCallback& callback) = 0;
 
+  // Add/remove a callback that can handle all kinds of mouse events.
+  typedef base::Callback<bool(const WebKit::WebMouseEvent&)> MouseEventCallback;
+  virtual void AddMouseEventCallback(const MouseEventCallback& callback) = 0;
+  virtual void RemoveMouseEventCallback(const MouseEventCallback& callback) = 0;
+
   // Get the screen info corresponding to this render widget.
   virtual void GetWebScreenInfo(WebKit::WebScreenInfo* result) = 0;