Revert 157773 - This is followup from Charlie's comments on Fady's cl: http://chromiumcodereview.ap…

content/browser/renderer_host/render_view_host_impl.cc

Index: content/browser/renderer_host/render_view_host_impl.cc
===================================================================
--- content/browser/renderer_host/render_view_host_impl.cc	(revision 157800)
+++ content/browser/renderer_host/render_view_host_impl.cc	(working copy)
@@ -29,7 +29,6 @@
 #include "content/browser/renderer_host/render_process_host_impl.h"
 #include "content/browser/renderer_host/render_view_host_delegate.h"
 #include "content/common/accessibility_messages.h"
-#include "content/common/browser_plugin_messages.h"
 #include "content/common/content_constants_internal.h"
 #include "content/common/desktop_notification_messages.h"
 #include "content/common/drag_messages.h"
@@ -834,17 +833,7 @@
 // RenderViewHostImpl, IPC message handlers:
 
 bool RenderViewHostImpl::OnMessageReceived(const IPC::Message& msg) {
-  // Allow BrowserPluginHostMsg_* sync messages to run on the UI thread.
-  // Platform apps will not support windowed plugins so the deadlock cycle
-  // browser -> plugin -> renderer -> browser referred in
-  // BrowserMessageFilter::CheckCanDispatchOnUI() is not supposed to happen. If
-  // we want to support windowed plugins, sync messages in BrowserPlugin might
-  // need to be changed to async messages.
-  // TODO(fsamuel): Disallow BrowserPluginHostMsg_* sync messages to run on UI
-  // thread and make these messages async: http://crbug.com/149063.
-  if (msg.type() != BrowserPluginHostMsg_HandleInputEvent::ID &&
-      msg.type() != BrowserPluginHostMsg_ResizeGuest::ID &&
-      !BrowserMessageFilter::CheckCanDispatchOnUI(msg, this))
+  if (!BrowserMessageFilter::CheckCanDispatchOnUI(msg, this))
     return true;
 
   // Filter out most IPC messages if this renderer is swapped out.