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

ui/views/controls/progress_bar.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/views/controls/progress_bar.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/logging.h"
@@ skipping 170 matching lines @@
 }
 
 gfx::Size ProgressBar::GetPreferredSize() {
   return gfx::Size(100, 16);
 }
 
 std::string ProgressBar::GetClassName() const {
   return kViewClassName;
 }
 
-void ProgressBar::OnPaint(gfx::Canvas* canvas) {
+void ProgressBar::OnPaint(gfx::CanvasSkia* canvas) {
   const double capped_value = std::min(
       std::max(current_value_, min_display_value_), max_display_value_);
   const double capped_fraction =
       (capped_value - min_display_value_) /
       (max_display_value_ - min_display_value_);
   const int progress_width = static_cast<int>(width() * capped_fraction + 0.5);
 
 #if defined(OS_CHROMEOS)
   const SkColor background_colors[] = {
     SkColorSetRGB(0xBB, 0xBB, 0xBB),
@@ skipping 93 matching lines @@
   if (progress_width > 1) {
     FillRoundRect(canvas, 0, 0, progress_width, height(), kCornerRadius,
                   kBarColorStart, kBarColorEnd, false);
   }
   StrokeRoundRect(canvas, 0, 0, width(), height(), kCornerRadius,
                   kBorderColor, kBorderWidth);
 #endif
 }
 
 }  // namespace views