ui: Make gfx::Size::Scale() mutate the class. Add gfx::ScaleSize() similar to Rect/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 1491 matching lines @@
     Send(new ViewHostMsg_PaintAtSize_ACK(routing_id_, tag, desired_size));
     return;
   }
 
   // Map the given DIB ID into this process, and unmap it at the end
   // of this function.
   scoped_ptr<TransportDIB> paint_at_size_buffer(
       TransportDIB::CreateWithHandle(dib_handle));
 
   gfx::Size page_size_in_pixel = gfx::ToFlooredSize(
-      page_size.Scale(device_scale_factor_));
+      gfx::ScaleSize(page_size, device_scale_factor_));
   gfx::Size desired_size_in_pixel = gfx::ToFlooredSize(
-      desired_size.Scale(device_scale_factor_));
+      gfx::ScaleSize(desired_size, device_scale_factor_));
   gfx::Size canvas_size = page_size_in_pixel;
   float x_scale = static_cast<float>(desired_size_in_pixel.width()) /
                   static_cast<float>(canvas_size.width());
   float y_scale = static_cast<float>(desired_size_in_pixel.height()) /
                   static_cast<float>(canvas_size.height());
 
   gfx::Rect orig_bounds(canvas_size);
   canvas_size.set_width(static_cast<int>(canvas_size.width() * x_scale));
   canvas_size.set_height(static_cast<int>(canvas_size.height() * y_scale));
   gfx::Rect bounds(canvas_size);
@@ skipping 397 matching lines @@
 bool RenderWidget::WillHandleGestureEvent(
     const WebKit::WebGestureEvent& event) {
   return false;
 }
 
 bool RenderWidget::WebWidgetHandlesCompositorScheduling() const {
   return false;
 }
 
 }  // namespace content