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

ui/gfx/canvas.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 "ui/gfx/canvas.h"
 
 #include <limits>
 
 #include "base/i18n/rtl.h"
 #include "base/logging.h"
@@ skipping 172 matching lines @@
   return canvas_->clipPath(path);
 }
 
 bool Canvas::GetClipBounds(gfx::Rect* bounds) {
   SkRect out;
   bool has_non_empty_clip = canvas_->getClipBounds(&out);
   bounds->SetRect(out.left(), out.top(), out.width(), out.height());
   return has_non_empty_clip;
 }
 
-void Canvas::Translate(const gfx::Point& point) {
-  canvas_->translate(SkIntToScalar(point.x()), SkIntToScalar(point.y()));
+void Canvas::Translate(const gfx::Vector2d& offset) {
+  canvas_->translate(SkIntToScalar(offset.x()), SkIntToScalar(offset.y()));
 }
 
 void Canvas::Scale(int x_scale, int y_scale) {
   canvas_->scale(SkIntToScalar(x_scale), SkIntToScalar(y_scale));
 }
 
 void Canvas::DrawColor(SkColor color) {
   DrawColor(color, SkXfermode::kSrcOver_Mode);
 }
 
@@ skipping 327 matching lines @@
 
     float bitmap_scale = image_rep.GetScale();
     if (scale_x < bitmap_scale || scale_y < bitmap_scale)
       const_cast<SkBitmap&>(image_rep.sk_bitmap()).buildMipMap();
   }
 
   return image_rep;
 }
 
 }  // namespace gfx