linux: OOP windowed plugins

chrome/browser/renderer_host/render_view_host.cc

Index: chrome/browser/renderer_host/render_view_host.cc
diff --git a/chrome/browser/renderer_host/render_view_host.cc b/chrome/browser/renderer_host/render_view_host.cc
index b7e0ad56355e5b05bea78a3d1dccd05d3c81fa03..d1e321fa6ad1ae7d6433bd00505c3359105839ec 100644
--- a/chrome/browser/renderer_host/render_view_host.cc
+++ b/chrome/browser/renderer_host/render_view_host.cc
@@ -671,6 +671,7 @@ bool RenderViewHost::SuddenTerminationAllowed() const {
 // RenderViewHost, IPC message handlers:
 
 void RenderViewHost::OnMessageReceived(const IPC::Message& msg) {
+#if defined(OS_WIN)
   if (msg.is_sync() && !msg.is_caller_pumping_messages()) {
     NOTREACHED() << "Can't send sync messages to UI thread without pumping "
         "messages in the renderer or else deadlocks can occur if the page "
@@ -680,6 +681,7 @@ void RenderViewHost::OnMessageReceived(const IPC::Message& msg) {
     Send(reply);
     return;
   }
+#endif
 
   bool msg_is_ok = true;
   IPC_BEGIN_MESSAGE_MAP_EX(RenderViewHost, msg, msg_is_ok)