Make printing work better with OOPIF.

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 eec99caa73e73b1e6d44b81bfc42c5fe8c484945..e2c9494348395102dfc56195a537d29a3afc7aa8 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -1481,8 +1481,14 @@ void RenderFrameImpl::OnImeFinishComposingText(bool keep_selection) {
 MediaStreamDispatcher* RenderFrameImpl::GetMediaStreamDispatcher() {
   if (!web_user_media_client_)
     InitializeUserMediaClient();
-  return web_user_media_client_ ?
-      web_user_media_client_->media_stream_dispatcher() : NULL;
+  return web_user_media_client_
+             ? web_user_media_client_->media_stream_dispatcher()
+             : nullptr;
+}
+
+void RenderFrameImpl::ScriptedPrint(bool user_initiated) {
+  for (auto& observer : observers_)
+    observer.ScriptedPrint(user_initiated);
 }
 
 bool RenderFrameImpl::Send(IPC::Message* message) {
@@ -1536,7 +1542,7 @@ bool RenderFrameImpl::OnMessageReceived(const IPC::Message& msg) {
                         OnCustomContextMenuAction)
 #if defined(ENABLE_PLUGINS)
     IPC_MESSAGE_HANDLER(FrameMsg_SetPepperVolume, OnSetPepperVolume)
-#endif  // defined(ENABLE_PLUGINS)
+#endif
     IPC_MESSAGE_HANDLER(InputMsg_Undo, OnUndo)
     IPC_MESSAGE_HANDLER(InputMsg_Redo, OnRedo)
     IPC_MESSAGE_HANDLER(InputMsg_Cut, OnCut)