Revert 97050 - Add PluginMessageLoopProxy and use it for Host plugin UI thread.

remoting/host/chromoting_host_context.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "remoting/host/chromoting_host_context.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/threading/thread.h"
 #include "remoting/jingle_glue/jingle_thread.h"
 
 namespace remoting {
 
-ChromotingHostContext::ChromotingHostContext(
-    base::MessageLoopProxy* ui_message_loop)
+ChromotingHostContext::ChromotingHostContext()
     : main_thread_("ChromotingMainThread"),
       encode_thread_("ChromotingEncodeThread"),
-      desktop_thread_("ChromotingDesktopThread"),
-      ui_message_loop_(ui_message_loop) {
+      desktop_thread_("ChromotingDesktopThread") {
 }
 
 ChromotingHostContext::~ChromotingHostContext() {
 }
 
 void ChromotingHostContext::Start() {
   // Start all the threads.
   main_thread_.Start();
   encode_thread_.Start();
   jingle_thread_.Start();
   desktop_thread_.Start();
 }
 
 void ChromotingHostContext::Stop() {
   // Stop all the threads.
   jingle_thread_.Stop();
   encode_thread_.Stop();
   main_thread_.Stop();
   desktop_thread_.Stop();
 }
 
 JingleThread* ChromotingHostContext::jingle_thread() {
   return &jingle_thread_;
 }
 
-base::MessageLoopProxy* ChromotingHostContext::ui_message_loop() {
-  return ui_message_loop_;
-}
-
 MessageLoop* ChromotingHostContext::main_message_loop() {
   return main_thread_.message_loop();
 }
 
 MessageLoop* ChromotingHostContext::encode_message_loop() {
   return encode_thread_.message_loop();
 }
 
 base::MessageLoopProxy* ChromotingHostContext::network_message_loop() {
   return jingle_thread_.message_loop_proxy();
 }
 
 MessageLoop* ChromotingHostContext::desktop_message_loop() {
   return desktop_thread_.message_loop();
 }
 
+void ChromotingHostContext::SetUITaskPostFunction(
+    const UIThreadPostTaskFunction& poster) {
+  ui_poster_ = poster;
+  ui_main_thread_id_ = base::PlatformThread::CurrentId();
+}
+
+void ChromotingHostContext::PostTaskToUIThread(
+    const tracked_objects::Location& from_here, const base::Closure& task) {
+  ui_poster_.Run(from_here, task);
+}
+
+void ChromotingHostContext::PostDelayedTaskToUIThread(
+    const tracked_objects::Location& from_here,
+    const base::Closure& task,
+    int delay_ms) {
+  // Post delayed task on the main thread that will post task on UI
+  // thread. It is safe to use base::Unretained() here because
+  // ChromotingHostContext owns |main_thread_|.
+  main_message_loop()->PostDelayedTask(from_here, base::Bind(
+      &ChromotingHostContext::PostTaskToUIThread, base::Unretained(this),
+      from_here, task), delay_ms);
+}
+
+bool ChromotingHostContext::IsUIThread() const {
+  return ui_main_thread_id_ == base::PlatformThread::CurrentId();
+}
+
 }  // namespace remoting