ui/gfx: Make gfx::Canvas inherit from gfx::CanvasSkia.

chrome/browser/ui/views/tabs/base_tab.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 "chrome/browser/ui/views/tabs/base_tab.h"
 
 #include <limits>
 
 #include "base/command_line.h"
 #include "base/utf_string_conversions.h"
@@ skipping 459 matching lines @@
 
   if (title.empty()) {
     title = data().loading ?
         l10n_util::GetStringUTF16(IDS_TAB_LOADING_TITLE) :
         CoreTabHelper::GetDefaultTitle();
   } else {
     Browser::FormatTitleForDisplay(&title);
   }
 
 #if defined(OS_WIN)
-  canvas->AsCanvasSkia()->DrawFadeTruncatingString(title,
+  canvas->DrawFadeTruncatingString(title,
       gfx::CanvasSkia::TruncateFadeTail, 0, *font_, title_color, title_bounds);
 #else
   canvas->DrawStringInt(title, *font_, title_color,
                         title_bounds.x(), title_bounds.y(),
                         title_bounds.width(), title_bounds.height());
 #endif
 }
 
 void BaseTab::AnimationProgressed(const ui::Animation* animation) {
   // Ignore if the pulse animation is being performed on active tab because
@@ skipping 81 matching lines @@
 // static
 void BaseTab::InitResources() {
   static bool initialized = false;
   if (!initialized) {
     initialized = true;
     font_ = new gfx::Font(
         ResourceBundle::GetSharedInstance().GetFont(ResourceBundle::BaseFont));
     font_height_ = font_->GetHeight();
   }
 }