Add Vector2d classes that represent offsets, instead of using Point.

content/browser/renderer_host/render_widget_host_impl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 
 #include <deque>
 #include <map>
 #include <queue>
@@ skipping 97 matching lines @@
   virtual bool CopyFromBackingStoreToCGContext(const CGRect& dest_rect,
                                                CGContextRef target) OVERRIDE;
 #endif
   virtual void EnableFullAccessibilityMode() OVERRIDE;
   virtual void ForwardMouseEvent(
       const WebKit::WebMouseEvent& mouse_event) OVERRIDE;
   virtual void ForwardWheelEvent(
       const WebKit::WebMouseWheelEvent& wheel_event) OVERRIDE;
   virtual void ForwardKeyboardEvent(
       const NativeWebKeyboardEvent& key_event) OVERRIDE;
-  virtual const gfx::Point& GetLastScrollOffset() const OVERRIDE;
+  virtual const gfx::Vector2d& GetLastScrollOffset() const OVERRIDE;
   virtual RenderProcessHost* GetProcess() const OVERRIDE;
   virtual int GetRoutingID() const OVERRIDE;
   virtual RenderWidgetHostView* GetView() const OVERRIDE;
   virtual bool IsLoading() const OVERRIDE;
   virtual bool IsRenderView() const OVERRIDE;
   virtual void PaintAtSize(TransportDIB::Handle dib_handle,
                            int tag,
                            const gfx::Size& page_size,
                            const gfx::Size& desired_size) OVERRIDE;
   virtual void Replace(const string16& word) OVERRIDE;
@@ skipping 682 matching lines @@
   // For example, pressing alt-2 may let the browser switch to the second tab,
   // but the Char event generated by alt-2 may also activate a HTML element
   // if its accesskey happens to be "2", then the user may get confused when
   // switching back to the original tab, because the content may already be
   // changed.
   bool suppress_next_char_events_;
 
   std::vector<gfx::PluginWindowHandle> deferred_plugin_handles_;
 
   // The last scroll offset of the render widget.
-  gfx::Point last_scroll_offset_;
+  gfx::Vector2d last_scroll_offset_;
 
   bool pending_mouse_lock_request_;
   bool allow_privileged_mouse_lock_;
 
   // Keeps track of whether the webpage has any touch event handler. If it does,
   // then touch events are sent to the renderer. Otherwise, the touch events are
   // not sent to the renderer.
   bool has_touch_handler_;
 
   base::WeakPtrFactory<RenderWidgetHostImpl> weak_factory_;
 
   typedef std::map<int, scoped_refptr<SmoothScrollGesture> >
       SmoothScrollGestureMap;
   SmoothScrollGestureMap active_smooth_scroll_gestures_;
   base::TimeTicks last_smooth_scroll_gestures_tick_time_;
   bool tick_active_smooth_scroll_gestures_task_posted_;
 
   scoped_ptr<TouchEventQueue> touch_event_queue_;
   scoped_ptr<GestureEventFilter> gesture_event_filter_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_