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

chrome/browser/ui/views/sad_tab_view.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/sad_tab_view.h"
 
 #include <string>
 
 #include "base/metrics/histogram.h"
 #include "base/utf_string_conversions.h"
@@ skipping 159 matching lines @@
 
       feedback_link_ = CreateLink(
           l10n_util::GetStringUTF16(IDS_KILLED_TAB_FEEDBACK_LINK));
       layout->StartRowWithPadding(0, column_set_id, 0, kPadding);
       layout->AddView(feedback_link_);
     }
   }
   layout->AddPaddingRow(1, kPadding);
 }
 
-void SadTabView::OnPaint(gfx::Canvas* canvas) {
+void SadTabView::OnPaint(gfx::CanvasSkia* canvas) {
   if (!painted_) {
     // User actually saw the error, keep track for user experience stats.
     UMA_HISTOGRAM_COUNTS("SadTab.Displayed", kind_);
     painted_ = true;
   }
   View::OnPaint(canvas);
 }
 
 views::Label* SadTabView::CreateLabel(const string16& text) {
   views::Label* label = new views::Label(text);
   label->SetFont(base_font_.DeriveFont(kMessageFontSizeDelta));
   label->SetBackgroundColor(background()->get_color());
   label->SetEnabledColor(kTextColor);
   return label;
 }
 
 views::Link* SadTabView::CreateLink(const string16& text) {
   views::Link* link = new views::Link(text);
   link->SetFont(base_font_.DeriveFont(kMessageFontSizeDelta));
   link->SetBackgroundColor(background()->get_color());
   link->SetEnabledColor(kTextColor);
   link->set_listener(this);
   return link;
 }