Revert of Plugins: Remove Shadow DOM Plugin Placeholder

content/public/renderer/content_renderer_client.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 "content/public/renderer/content_renderer_client.h"
 
 #include "content/public/renderer/media_stream_renderer_factory.h"
 #include "media/base/renderer_factory.h"
 #include "third_party/WebKit/public/platform/modules/app_banner/WebAppBannerClient.h"
+#include "third_party/WebKit/public/web/WebPluginPlaceholder.h"
 
 namespace content {
 
 SkBitmap* ContentRendererClient::GetSadPluginBitmap() {
   return nullptr;
 }
 
 SkBitmap* ContentRendererClient::GetSadWebViewBitmap() {
   return nullptr;
 }
 
+scoped_ptr<blink::WebPluginPlaceholder>
+ContentRendererClient::CreatePluginPlaceholder(
+    RenderFrame* render_frame,
+    blink::WebLocalFrame* frame,
+    const blink::WebPluginParams& params) {
+  return nullptr;
+}
+
 bool ContentRendererClient::OverrideCreatePlugin(
     RenderFrame* render_frame,
     blink::WebLocalFrame* frame,
     const blink::WebPluginParams& params,
     blink::WebPlugin** plugin) {
   return false;
 }
 
 blink::WebPlugin* ContentRendererClient::CreatePluginReplacement(
     RenderFrame* render_frame,
@@ skipping 170 matching lines @@
 std::string ContentRendererClient::GetUserAgentOverrideForURL(const GURL& url) {
   return std::string();
 }
 
 scoped_ptr<blink::WebAppBannerClient>
 ContentRendererClient::CreateAppBannerClient(RenderFrame* render_frame) {
   return nullptr;
 }
 
 }  // namespace content