ui: Make gfx::Size::Scale() mutate the class. Add gfx::ScaleSize() similar to Rect/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 545 matching lines @@
   // TODO(brettw) bug 56673: do a direct memcpy instead of going through CG
   // if the is_always_opaque_ flag is set. Must ensure bitmap is still clipped.
 
   CGContextDrawImage(canvas, bitmap_rect, image);
 #else
   gfx::Rect invalidate_rect = gfx::IntersectRects(plugin_rect, paint_rect);
   SkRect sk_invalidate_rect = gfx::RectToSkRect(invalidate_rect);
   SkAutoCanvasRestore auto_restore(canvas, true);
   canvas->clipRect(sk_invalidate_rect);
   gfx::Size pixel_image_size(image_data_->width(), image_data_->height());
-  gfx::Size image_size = gfx::ToFlooredSize(pixel_image_size.Scale(scale_));
+  gfx::Size image_size = gfx::ToFlooredSize(
+      gfx::ScaleSize(pixel_image_size, scale_));
 
   PluginInstance* plugin_instance = ResourceHelper::GetPluginInstance(this);
   if (!plugin_instance)
     return;
   if (plugin_instance->IsFullPagePlugin()) {
     // When we're resizing a window with a full-frame plugin, the plugin may
     // not yet have bound a new device, which will leave parts of the
     // background exposed if the window is getting larger. We want this to
     // show white (typically less jarring) rather than black or uninitialized.
     // We don't do this for non-full-frame plugins since we specifically want
@@ skipping 180 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