Plugins: Remove Shadow DOM Plugin Placeholder

chrome/renderer/chrome_content_renderer_client.h

Index: chrome/renderer/chrome_content_renderer_client.h
diff --git a/chrome/renderer/chrome_content_renderer_client.h b/chrome/renderer/chrome_content_renderer_client.h
index 385fdbc7df4a33ed95bd215e12508d1bc96f334e..29b95e9c80d38f03f05977d4869d90cbf2cb83ad 100644
--- a/chrome/renderer/chrome_content_renderer_client.h
+++ b/chrome/renderer/chrome_content_renderer_client.h
@@ -89,10 +89,6 @@ class ChromeContentRendererClient : public content::ContentRendererClient {
                             blink::WebLocalFrame* frame,
                             const blink::WebPluginParams& params,
                             blink::WebPlugin** plugin) override;
-  scoped_ptr<blink::WebPluginPlaceholder> CreatePluginPlaceholder(
-      content::RenderFrame* render_frame,
-      blink::WebLocalFrame* frame,
-      const blink::WebPluginParams& params) override;
   blink::WebPlugin* CreatePluginReplacement(
       content::RenderFrame* render_frame,
       const base::FilePath& plugin_path) override;