Prevent npapi plugin paint when SkPicture based painting is used.

webkit/plugins/npapi/webplugin_delegate_impl_win.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 "webkit/plugins/npapi/webplugin_delegate_impl.h"
 
 #include <map>
 #include <string>
 #include <vector>
 
@@ skipping 626 matching lines @@
     g_iat_patch_reg_enum_key_ex_w.Pointer()->Unpatch();
 
   if (mouse_hook_) {
     UnhookWindowsHookEx(mouse_hook_);
     mouse_hook_ = NULL;
   }
 }
 
 void WebPluginDelegateImpl::Paint(WebKit::WebCanvas* canvas,
                                   const gfx::Rect& rect) {
-  if (windowless_) {
+  if (windowless_ && skia::SupportsPlatformPaint(canvas)) {
     skia::ScopedPlatformPaint scoped_platform_paint(canvas);
     HDC hdc = scoped_platform_paint.GetPlatformSurface();
     WindowlessPaint(hdc, rect);
   }
 }
 
 bool WebPluginDelegateImpl::WindowedCreatePlugin() {
   DCHECK(!windowed_handle_);
 
   RegisterNativeWindowClass();
@@ skipping 1014 matching lines @@
       ::ReleaseCapture();
       break;
 
     default:
       break;
   }
 }
 
 }  // namespace npapi
 }  // namespace webkit