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

remoting/host/chromoting_host_context.cc

Index: remoting/host/chromoting_host_context.cc
===================================================================
--- remoting/host/chromoting_host_context.cc	(revision 97052)
+++ remoting/host/chromoting_host_context.cc	(working copy)
@@ -12,12 +12,10 @@
 
 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() {
@@ -43,10 +41,6 @@
   return &jingle_thread_;
 }
 
-base::MessageLoopProxy* ChromotingHostContext::ui_message_loop() {
-  return ui_message_loop_;
-}
-
 MessageLoop* ChromotingHostContext::main_message_loop() {
   return main_thread_.message_loop();
 }
@@ -63,4 +57,31 @@
   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