Revert of Plugins: Remove Shadow DOM Plugin Placeholder

chrome/renderer/chrome_content_renderer_client.cc

Index: chrome/renderer/chrome_content_renderer_client.cc
diff --git a/chrome/renderer/chrome_content_renderer_client.cc b/chrome/renderer/chrome_content_renderer_client.cc
index 6f7b3ccec68f70b9e7fec79c079f8d444d92873f..5bc5267dedd73d7315aba3a4dfe7d93bb1463b8e 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -43,6 +43,7 @@
 #include "chrome/renderer/plugins/non_loadable_plugin_placeholder.h"
 #include "chrome/renderer/plugins/plugin_preroller.h"
 #include "chrome/renderer/plugins/plugin_uma.h"
+#include "chrome/renderer/plugins/shadow_dom_plugin_placeholder.h"
 #include "chrome/renderer/prerender/prerender_dispatcher.h"
 #include "chrome/renderer/prerender/prerender_helper.h"
 #include "chrome/renderer/prerender/prerenderer_client.h"
@@ -91,6 +92,7 @@
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "third_party/WebKit/public/web/WebPluginContainer.h"
 #include "third_party/WebKit/public/web/WebPluginParams.h"
+#include "third_party/WebKit/public/web/WebPluginPlaceholder.h"
 #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
 #include "third_party/WebKit/public/web/WebSecurityPolicy.h"
 #include "ui/base/l10n/l10n_util.h"
@@ -640,6 +642,15 @@
   return extensions::RendererExtensionRegistry::Get()->GetByID(extension_id);
 }
 #endif
+
+scoped_ptr<blink::WebPluginPlaceholder>
+ChromeContentRendererClient::CreatePluginPlaceholder(
+    content::RenderFrame* render_frame,
+    blink::WebLocalFrame* frame,
+    const blink::WebPluginParams& orig_params) {
+  return CreateShadowDOMPlaceholderForPluginInfo(
+      render_frame, frame, orig_params);
+}
 
 bool ChromeContentRendererClient::OverrideCreatePlugin(
     content::RenderFrame* render_frame,