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

webkit/plugins/ppapi/ppb_graphics_2d_impl.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 "webkit/plugins/ppapi/ppb_graphics_2d_impl.h"
 
 #include <iterator>
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
@@ skipping 687 matching lines @@
     SkPaint paint;
     paint.setXfermodeMode(SkXfermode::kSrc_Mode);
     backing_canvas->drawBitmapRect(*image->GetMappedBitmap(),
                                    &src_irect, dest_rect, &paint);
   }
 }
 
 void PPB_Graphics2D_Impl::ExecuteScroll(const gfx::Rect& clip,
                                         int dx, int dy,
                                         gfx::Rect* invalidated_rect) {
-  gfx::ScrollCanvas(image_data_->GetCanvas(),
-                    clip, gfx::Point(dx, dy));
+  gfx::ScrollCanvas(image_data_->GetCanvas(), clip, gfx::Vector2d(dx, dy));
   *invalidated_rect = clip;
 }
 
 void PPB_Graphics2D_Impl::ExecuteReplaceContents(PPB_ImageData_Impl* image,
                                                  gfx::Rect* invalidated_rect,
                                                  PP_Resource* old_image_data) {
   if (image->format() != image_data_->format()) {
     DCHECK(image->width() == image_data_->width() &&
            image->height() == image_data_->height());
     // Convert the image data if the format does not match.
@@ skipping 40 matching lines @@
 }
 
 bool PPB_Graphics2D_Impl::HasPendingFlush() const {
   return !unpainted_flush_callback_.is_null() ||
          !painted_flush_callback_.is_null() ||
          offscreen_flush_pending_;
 }
 
 }  // namespace ppapi
 }  // namespace webkit