Allow CanvasSkia to bind to an existing SkCanvas.

chrome/browser/ui/views/tabs/dragged_tab_view.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 "chrome/browser/ui/views/tabs/dragged_tab_view.h"
 
 #include "base/stl_util.h"
 #include "chrome/browser/ui/views/tabs/native_view_photobooth.h"
 #include "third_party/skia/include/core/SkShader.h"
 #include "ui/gfx/canvas_skia.h"
@@ skipping 119 matching lines @@
   return gfx::Size(width, height);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DraggedTabView, private:
 
 void DraggedTabView::PaintDetachedView(gfx::Canvas* canvas) {
   gfx::Size ps = GetPreferredSize();
   gfx::CanvasSkia scale_canvas(ps.width(), ps.height(), false);
   SkBitmap& bitmap_device = const_cast<SkBitmap&>(
-      skia::GetTopDevice(scale_canvas)->accessBitmap(true));
+      skia::GetTopDevice(*scale_canvas.sk_canvas())->accessBitmap(true));
   bitmap_device.eraseARGB(0, 0, 0, 0);
 
   int tab_height = renderer_bounds_.back().height();
   scale_canvas.FillRectInt(kDraggedTabBorderColor, 0,
       tab_height - kDragFrameBorderSize,
       ps.width(), ps.height() - tab_height);
   int image_x = kDragFrameBorderSize;
   int image_y = tab_height;
   int image_w = ps.width() - kTwiceDragFrameBorderSize;
   int image_h = contents_size_.height();
@@ skipping 20 matching lines @@
   SkPaint paint;
   paint.setShader(bitmap_shader);
   paint.setAntiAlias(true);
   bitmap_shader->unref();
 
   SkRect rc;
   rc.fLeft = 0;
   rc.fTop = 0;
   rc.fRight = SkIntToScalar(ps.width());
   rc.fBottom = SkIntToScalar(ps.height());
-  canvas->AsCanvasSkia()->drawRect(rc, paint);
+  canvas->GetSkCanvas()->drawRect(rc, paint);
 }
 
 void DraggedTabView::PaintFocusRect(gfx::Canvas* canvas) {
   gfx::Size ps = GetPreferredSize();
   canvas->DrawFocusRect(0, 0,
                         static_cast<int>(ps.width() * kScalingFactor),
                         static_cast<int>(ps.height() * kScalingFactor));
 }
 
 gfx::Size DraggedTabView::PreferredContainerSize() {
   gfx::Size ps = GetPreferredSize();
   return gfx::Size(ScaleValue(ps.width()), ScaleValue(ps.height()));
 }
 
 int DraggedTabView::ScaleValue(int value) {
   return static_cast<int>(value * kScalingFactor);
 }