[Chromoting] Introducing refcount-based life time management of the message loops in the service (d…

remoting/host/chromoting_host_context.h

Index: remoting/host/chromoting_host_context.h
diff --git a/remoting/host/chromoting_host_context.h b/remoting/host/chromoting_host_context.h
index 2e3480d69d3a1c50f59421615d2aad0d494ce494..2a5adcbc97c038181aca0a36b7794f6fab1ec739 100644
--- a/remoting/host/chromoting_host_context.h
+++ b/remoting/host/chromoting_host_context.h
@@ -5,22 +5,17 @@
 #ifndef REMOTING_HOST_CHROMOTING_HOST_CONTEXT_H_
 #define REMOTING_HOST_CHROMOTING_HOST_CONTEXT_H_
 
-#include <string>
-
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
-#include "base/threading/platform_thread.h"
+#include "base/single_thread_task_runner.h"
 #include "base/threading/thread.h"
 
-namespace base {
-class SingleThreadTaskRunner;
-}  // namespace base
-
 namespace net {
 class URLRequestContextGetter;
 }  // namespace net
 
 namespace remoting {
+class AutoThreadTaskRunner;
 
 // A class that manages threads and running context for the chromoting host
 // process.  This class is virtual only for testing purposes (see below).
@@ -28,7 +23,7 @@ class ChromotingHostContext {
  public:
   // Create a context.
   ChromotingHostContext(
-      scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner);
+      scoped_refptr<AutoThreadTaskRunner> ui_task_runner);
   virtual ~ChromotingHostContext();
 
   // TODO(ajwong): Move the Start method out of this class. Then
@@ -38,6 +33,8 @@ class ChromotingHostContext {
   // this API.
   virtual bool Start();
 
+  void ReleaseTaskRunners();
+
   // Task runner for the thread that is used for the UI. In the NPAPI
   // plugin this corresponds to the main plugin thread.
   virtual base::SingleThreadTaskRunner* ui_task_runner();
@@ -86,7 +83,15 @@ class ChromotingHostContext {
   // Thread for blocking IO operations.
   base::Thread file_thread_;
 
-  scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner_;
+  // Task runners wrapping the above threads. These should be declared after
+  // the corresponding threads to guarantee proper order of destruction.
+  scoped_refptr<base::SingleThreadTaskRunner> network_task_runner_;
+  scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner_;
+  scoped_refptr<base::SingleThreadTaskRunner> encode_task_runner_;
+  scoped_refptr<base::SingleThreadTaskRunner> desktop_task_runner_;
+  scoped_refptr<base::SingleThreadTaskRunner> file_task_runner_;
+
+  scoped_refptr<AutoThreadTaskRunner> ui_task_runner_;
 
   scoped_refptr<net::URLRequestContextGetter> url_request_context_getter_;