Remove BrowserPlugin's -internal-attach method

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index d7e21f3205642d14a5f0576aa9226966ad07d96c..c049048d45a752ed7c21b298fcb2541f64d24277 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -1451,6 +1451,10 @@ bool RenderFrameImpl::IsFTPDirectoryListing() {
   return extra_data ? extra_data->is_ftp_directory_listing() : false;
 }
 
+void RenderFrameImpl::AttachGuest(int element_instance_id) {
+  render_view_->GetBrowserPluginManager()->Attach(element_instance_id);
+}
+
 // blink::WebFrameClient implementation ----------------------------------------
 
 blink::WebPlugin* RenderFrameImpl::createPlugin(