wm: Change the DispatcherClient interface.

ui/wm/public/dispatcher_client.cc

Index: ui/wm/public/dispatcher_client.cc
diff --git a/ui/wm/public/dispatcher_client.cc b/ui/wm/public/dispatcher_client.cc
index cec4a8ad1d6d0d647653d7bc2f6f6f501b61bb1b..e3be7ca848b76ecc597845d43a042dab6b31f03e 100644
--- a/ui/wm/public/dispatcher_client.cc
+++ b/ui/wm/public/dispatcher_client.cc
@@ -4,6 +4,7 @@
 
 #include "ui/wm/public/dispatcher_client.h"
 
+#include "base/callback.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_property.h"
 
@@ -12,6 +13,28 @@ DECLARE_WINDOW_PROPERTY_TYPE(aura::client::DispatcherClient*);
 namespace aura {
 namespace client {
 
+DispatcherRunLoop::DispatcherRunLoop(DispatcherClient* client,
+                                     base::MessagePumpDispatcher* dispatcher) {
+  client->PrepareNestedLoopClosures(dispatcher, &run_closure_, &quit_closure_);
+}
+
+DispatcherRunLoop::~DispatcherRunLoop() {
+}
+
+void DispatcherRunLoop::Run() {
+  base::MessageLoopForUI* loop = base::MessageLoopForUI::current();
+  base::MessageLoopForUI::ScopedNestableTaskAllower allow_nested(loop);
+  run_closure_.Run();
+}
+
+base::Closure DispatcherRunLoop::QuitClosure() {
+  return quit_closure_;
+}
+
+void DispatcherRunLoop::Quit() {
+  quit_closure_.Run();
+}
+
 DEFINE_LOCAL_WINDOW_PROPERTY_KEY(DispatcherClient*, kDispatcherClientKey, NULL);
 
 void SetDispatcherClient(Window* root_window, DispatcherClient* client) {