Prevent npapi plugin paint when SkPicture based painting is used.

webkit/plugins/npapi/webplugin_delegate_impl_win.cc

Index: webkit/plugins/npapi/webplugin_delegate_impl_win.cc
diff --git a/webkit/plugins/npapi/webplugin_delegate_impl_win.cc b/webkit/plugins/npapi/webplugin_delegate_impl_win.cc
index 7a82402195b6b7bd5fa96ee7584e4c6495f10f36..f308202cb956420d3e1fe15949e6cbd7309317ab 100644
--- a/webkit/plugins/npapi/webplugin_delegate_impl_win.cc
+++ b/webkit/plugins/npapi/webplugin_delegate_impl_win.cc
@@ -644,7 +644,7 @@ void WebPluginDelegateImpl::PlatformDestroyInstance() {
 
 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);