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

content/renderer/render_widget.cc

 // 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.
 
 #include "content/renderer/render_widget.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 1590 matching lines @@
 webkit::ppapi::PluginInstance* RenderWidget::GetBitmapForOptimizedPluginPaint(
     const gfx::Rect& paint_bounds,
     TransportDIB** dib,
     gfx::Rect* location,
     gfx::Rect* clip,
     float* scale_factor) {
   // Bare RenderWidgets don't support optimized plugin painting.
   return NULL;
 }
 
-gfx::Point RenderWidget::GetScrollOffset() {
+gfx::Vector2d RenderWidget::GetScrollOffset() {
   // Bare RenderWidgets don't support scroll offset.
-  return gfx::Point(0, 0);
+  return gfx::Vector2d();
 }
 
 void RenderWidget::SetHidden(bool hidden) {
   if (is_hidden_ == hidden)
     return;
 
   // The status has changed.  Tell the RenderThread about it.
   is_hidden_ = hidden;
   if (is_hidden_)
     RenderThread::Get()->WidgetHidden();
@@ skipping 279 matching lines @@
 
 bool RenderWidget::WillHandleMouseEvent(const WebKit::WebMouseEvent& event) {
   return false;
 }
 
 bool RenderWidget::WebWidgetHandlesCompositorScheduling() const {
   return false;
 }
 
 }  // namespace content