Allow CanvasSkia to bind to an existing SkCanvas.

views/widget/native_widget_win.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/widget/native_widget_win.h"
 
 #include <dwmapi.h>
 #include <shellapi.h>
 
 #include <algorithm>
@@ skipping 2285 matching lines @@
                    RDW_INVALIDATE | RDW_UPDATENOW | RDW_NOCHILDREN);
     }
   }
 }
 
 void NativeWidgetWin::RedrawLayeredWindowContents() {
   if (invalid_rect_.IsEmpty())
     return;
 
   // We need to clip to the dirty rect ourselves.
-  layered_window_contents_->save(SkCanvas::kClip_SaveFlag);
+  layered_window_contents_->sk_canvas()->save(SkCanvas::kClip_SaveFlag);
   layered_window_contents_->ClipRectInt(invalid_rect_.x(),
                                         invalid_rect_.y(),
                                         invalid_rect_.width(),
                                         invalid_rect_.height());
   GetWidget()->GetRootView()->Paint(layered_window_contents_.get());
-  layered_window_contents_->restore();
+  layered_window_contents_->sk_canvas()->restore();
 
   RECT wr;
   GetWindowRect(&wr);
   SIZE size = {wr.right - wr.left, wr.bottom - wr.top};
   POINT position = {wr.left, wr.top};
-  HDC dib_dc = skia::BeginPlatformPaint(layered_window_contents_.get());
+  HDC dib_dc = skia::BeginPlatformPaint(layered_window_contents_->sk_canvas());
   POINT zero = {0, 0};
   BLENDFUNCTION blend = {AC_SRC_OVER, 0, layered_alpha_, AC_SRC_ALPHA};
   UpdateLayeredWindow(hwnd(), NULL, &position, &size, dib_dc, &zero,
                       RGB(0xFF, 0xFF, 0xFF), &blend, ULW_ALPHA);
   invalid_rect_.SetRect(0, 0, 0, 0);
-  skia::EndPlatformPaint(layered_window_contents_.get());
+  skia::EndPlatformPaint(layered_window_contents_->sk_canvas());
 }
 
 void NativeWidgetWin::LockUpdates() {
   // We skip locked updates when Aero is on for two reasons:
   // 1. Because it isn't necessary
   // 2. Because toggling the WS_VISIBLE flag may occur while the GPU process is
   //    attempting to present a child window's backbuffer onscreen. When these
   //    two actions race with one another, the child window will either flicker
   //    or will simply stop updating entirely.
   if (!IsAeroGlassEnabled() && ++lock_updates_count_ == 1) {
@@ skipping 272 matching lines @@
   return (GetKeyState(VK_LBUTTON) & 0x80) ||
     (GetKeyState(VK_RBUTTON) & 0x80) ||
     (GetKeyState(VK_MBUTTON) & 0x80) ||
     (GetKeyState(VK_XBUTTON1) & 0x80) ||
     (GetKeyState(VK_XBUTTON2) & 0x80);
 }
 
 }  // namespace internal
 
 }  // namespace views