Mouse lock implementation, including the renderer side and the Windows version of the browser side.

content/renderer/render_view.h

Index: content/renderer/render_view.h
diff --git a/content/renderer/render_view.h b/content/renderer/render_view.h
index 68a12ad752ad06500890c402c4338f5b3498fcbc..6da0248b61fa99ba908dc98b4039a2bfe38c6b7f 100644
--- a/content/renderer/render_view.h
+++ b/content/renderer/render_view.h
@@ -632,6 +632,8 @@ class RenderView : public RenderWidget,
       gfx::Rect* clip);
   virtual gfx::Point GetScrollOffset();
   virtual void DidHandleKeyEvent();
+  virtual bool WillHandleMouseEvent(
+      const WebKit::WebMouseEvent& event) OVERRIDE;
   virtual void DidHandleMouseEvent(const WebKit::WebMouseEvent& event);
   virtual void OnSetFocus(bool enable);
   virtual void OnWasHidden();
@@ -813,8 +815,10 @@ class RenderView : public RenderWidget,
       const std::vector<GURL>& links,
       const std::vector<FilePath>& local_paths,
       const FilePath& local_directory_name);
+  void OnLockMouseACK(bool succeeded);
   void OnMediaPlayerActionAt(const gfx::Point& location,
                              const WebKit::WebMediaPlayerAction& action);
+  void OnMouseLockLost();
   void OnMoveOrResizeStarted();
   void OnNavigate(const ViewMsg_Navigate_Params& params);
   void OnPaste();