Allow CanvasSkia to bind to an existing SkCanvas.

chrome/browser/chromeos/login/username_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/chromeos/login/username_view.h"
 
 #include "base/logging.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/chromeos/login/rounded_view.h"
 #include "grit/generated_resources.h"
@@ skipping 45 matching lines @@
 }
 
 gfx::NativeCursor UsernameView::GetCursor(const views::MouseEvent& event) {
   return use_small_shape_ ? gfx::GetCursor(GDK_HAND2) : NULL;
 }
 
 void UsernameView::PaintUsername(const gfx::Rect& bounds) {
   margin_width_ = bounds.height() * kMarginRatio;
   gfx::CanvasSkia canvas(bounds.width(), bounds.height(), false);
   // Draw transparent background.
-  canvas.drawColor(0);
+  canvas.sk_canvas()->drawColor(0);
 
   // Calculate needed space.
   int flags = gfx::Canvas::TEXT_ALIGN_LEFT |
       gfx::Canvas::TEXT_VALIGN_MIDDLE |
       gfx::Canvas::NO_ELLIPSIS;
   int text_height, text_width;
   gfx::CanvasSkia::SizeStringInt(WideToUTF16Hack(GetText()), font(),
                                  &text_width, &text_height,
                                  flags);
   text_width += margin_width_;
@@ skipping 24 matching lines @@
     // Draw the final background with the fading in the end.
     SkShader* solid_shader = new SkColorShader(kLabelBackgoundColor);
     SkXfermode* mode = SkXfermode::Create(SkXfermode::kSrcIn_Mode);
     SkShader* composite_shader = new SkComposeShader(gradient_shader,
                                                      solid_shader, mode);
     gradient_shader->unref();
     solid_shader->unref();
 
     SkPaint paint;
     paint.setShader(composite_shader)->unref();
-    canvas.drawPaint(paint);
+    canvas.sk_canvas()->drawPaint(paint);
   }
 
   // Draw the text.
   // Note, direct call of the DrawStringInt method produces the green dots
   // along the text perimeter (when the label is place on the white background).
   SkColor kInvisibleHaloColor = 0x00000000;
   canvas.DrawStringWithHalo(WideToUTF16Hack(GetText()), font(), GetColor(),
                             kInvisibleHaloColor, bounds.x() + margin_width_,
                             bounds.y(), bounds.width() - 2 * margin_width_,
                             bounds.height(), flags);
 
   text_image_.reset(new SkBitmap(canvas.ExtractBitmap()));
 
   if (use_fading_for_text) {
     // Fade out only the text in the end. Use regular background.
-    canvas.drawColor(kLabelBackgoundColor, SkXfermode::kSrc_Mode);
+    canvas.sk_canvas()->drawColor(kLabelBackgoundColor, SkXfermode::kSrc_Mode);
     SkShader* image_shader = SkShader::CreateBitmapShader(
         *text_image_,
         SkShader::kRepeat_TileMode,
         SkShader::kRepeat_TileMode);
     SkXfermode* mode = SkXfermode::Create(SkXfermode::kSrcIn_Mode);
     SkShader* composite_shader = new SkComposeShader(gradient_shader,
                                                      image_shader, mode);
     gradient_shader->unref();
     image_shader->unref();
 
     SkPaint paint;
     paint.setShader(composite_shader)->unref();
-    canvas.drawPaint(paint);
+    canvas.sk_canvas()->drawPaint(paint);
     text_image_.reset(new SkBitmap(canvas.ExtractBitmap()));
   }
 }
 
 void UsernameView::OnLocaleChanged() {
   if (is_guest_) {
     SetText(UTF16ToWide(l10n_util::GetStringUTF16(IDS_GUEST)));
   }
   // Repaint because the font may have changed.
   text_image_.reset();
   SchedulePaint();
 }
 
 }  // namespace chromeos