Teach main thread event queue about closures.

content/renderer/input/input_handler_manager.cc

Index: content/renderer/input/input_handler_manager.cc
diff --git a/content/renderer/input/input_handler_manager.cc b/content/renderer/input/input_handler_manager.cc
index f1f02b68179eeae85da7cd43ccb5743ec4a196a0..57ea25818726774e3893fc4590e85c66ac186ef4 100644
--- a/content/renderer/input/input_handler_manager.cc
+++ b/content/renderer/input/input_handler_manager.cc
@@ -129,6 +129,31 @@ void InputHandlerManager::RemoveInputHandler(int routing_id) {
   input_handlers_.erase(routing_id);
 }
 
+void InputHandlerManager::RegisterAssociatedRenderFrameRoutingID(
+    int render_frame_routing_id,
+    int render_view_routing_id) {
+  if (task_runner_->BelongsToCurrentThread()) {
+    RegisterAssociatedRenderFrameRoutingIDOnCompositorThread(
+        render_frame_routing_id, render_view_routing_id);
+  } else {
+    task_runner_->PostTask(
+        FROM_HERE,
+        base::Bind(&InputHandlerManager::
+                       RegisterAssociatedRenderFrameRoutingIDOnCompositorThread,
+                   base::Unretained(this), render_frame_routing_id,
+                   render_view_routing_id));
+  }
+}
+
+void InputHandlerManager::
+    RegisterAssociatedRenderFrameRoutingIDOnCompositorThread(
+        int render_frame_routing_id,
+        int render_view_routing_id) {
+  DCHECK(task_runner_->BelongsToCurrentThread());
+  client_->RegisterAssociatedRenderFrameRoutingID(render_frame_routing_id,
+                                                  render_view_routing_id);
+}
+
 void InputHandlerManager::RegisterRoutingID(int routing_id) {
   if (task_runner_->BelongsToCurrentThread()) {
     RegisterRoutingIDOnCompositorThread(routing_id);
@@ -230,6 +255,12 @@ void InputHandlerManager::HandleInputEvent(
                  weak_ptr_factory_.GetWeakPtr(), callback));
 }
 
+void InputHandlerManager::QueueClosureForMainThreadEventQueue(
+    int routing_id,
+    const base::Closure& closure) {
+  client_->QueueClosureForMainThreadEventQueue(routing_id, closure);
+}
+
 void InputHandlerManager::DidHandleInputEventAndOverscroll(
     const InputEventAckStateCallback& callback,
     InputHandlerProxy::EventDisposition event_disposition,