Allow CanvasSkia to bind to an existing SkCanvas.

views/controls/button/text_button.cc

 // Copyright (c) 2011 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 "views/controls/button/text_button.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/utf_string_conversions.h"
@@ skipping 123 matching lines @@
   const BorderImageSet* set = &normal_set_;
   if (button->show_multiple_icon_states() &&
       ((state == TextButton::BS_HOT) || (state == TextButton::BS_PUSHED)))
     set = (state == TextButton::BS_HOT) ? &hot_set_ : &pushed_set_;
   if (set->top_left) {
     if (button->GetAnimation()->is_animating()) {
       // TODO(pkasting): Really this should crossfade between states so it could
       // handle the case of having a non-NULL |normal_set_|.
       canvas->SaveLayerAlpha(static_cast<uint8>(
           button->GetAnimation()->CurrentValueBetween(0, 255)));
-      canvas->AsCanvasSkia()->drawARGB(0, 255, 255, 255,
-                                       SkXfermode::kClear_Mode);
+      canvas->GetSkCanvas()->drawARGB(0, 255, 255, 255,
+                                      SkXfermode::kClear_Mode);
       Paint(view, canvas, *set);
       canvas->Restore();
     } else {
       Paint(view, canvas, *set);
     }
   }
 }
 
 void TextButtonBorder::Paint(const View& view,
                              gfx::Canvas* canvas,
@@ skipping 50 matching lines @@
 }
 
 TextButtonNativeThemeBorder::~TextButtonNativeThemeBorder() {
 }
 
 void TextButtonNativeThemeBorder::Paint(const View& view,
                                         gfx::Canvas* canvas) const {
   const TextButtonBase* tb = static_cast<const TextButton*>(&view);
   const gfx::NativeTheme* native_theme = gfx::NativeTheme::instance();
   gfx::NativeTheme::Part part = delegate_->GetThemePart();
-  gfx::CanvasSkia* skia_canvas = canvas->AsCanvasSkia();
   gfx::Rect rect(delegate_->GetThemePaintRect());
 
   if (tb->show_multiple_icon_states() &&
       delegate_->GetThemeAnimation() != NULL &&
       delegate_->GetThemeAnimation()->is_animating()) {
     // Paint background state.
     gfx::NativeTheme::ExtraParams prev_extra;
     gfx::NativeTheme::State prev_state =
         delegate_->GetBackgroundThemeState(&prev_extra);
-    native_theme->Paint(skia_canvas, part, prev_state, rect, prev_extra);
+    native_theme->Paint(
+        canvas->GetSkCanvas(), part, prev_state, rect, prev_extra);
 
     // Composite foreground state above it.
     gfx::NativeTheme::ExtraParams extra;
     gfx::NativeTheme::State state = delegate_->GetForegroundThemeState(&extra);
     int alpha = delegate_->GetThemeAnimation()->CurrentValueBetween(0, 255);
-    skia_canvas->SaveLayerAlpha(static_cast<uint8>(alpha));
-    native_theme->Paint(skia_canvas, part, state, rect, extra);
-    skia_canvas->Restore();
+    canvas->SaveLayerAlpha(static_cast<uint8>(alpha));
+    native_theme->Paint(canvas->GetSkCanvas(), part, state, rect, extra);
+    canvas->Restore();
   } else {
     gfx::NativeTheme::ExtraParams extra;
     gfx::NativeTheme::State state = delegate_->GetThemeState(&extra);
-    native_theme->Paint(skia_canvas, part, state, rect, extra);
+    native_theme->Paint(canvas->GetSkCanvas(), part, state, rect, extra);
   }
 }
 
 void TextButtonNativeThemeBorder::GetInsets(gfx::Insets* insets) const {
   insets->Set(kPreferredNativeThemePaddingVertical,
               kPreferredNativeThemePaddingHorizontal,
               kPreferredNativeThemePaddingVertical,
               kPreferredNativeThemePaddingHorizontal);
 }
 
@@ skipping 575 matching lines @@
 #endif
 }
 
 void NativeTextButton::GetExtraParams(
     gfx::NativeTheme::ExtraParams* params) const {
   TextButton::GetExtraParams(params);
   params->button.has_border = true;
 }
 
 }  // namespace views