Replace PluginThreadTaskRunner with a simpler MainPluginThreadTaskRunner.

remoting/client/plugin/chromoting_instance.h

Index: remoting/client/plugin/chromoting_instance.h
diff --git a/remoting/client/plugin/chromoting_instance.h b/remoting/client/plugin/chromoting_instance.h
index a07ecf6fd492272291a2f1b7f588fd80e9d908e3..35a70503e190c42138e34b5074b6fa3885a8ba48 100644
--- a/remoting/client/plugin/chromoting_instance.h
+++ b/remoting/client/plugin/chromoting_instance.h
@@ -20,9 +20,9 @@
 #include "remoting/client/client_user_interface.h"
 #include "remoting/client/empty_cursor_filter.h"
 #include "remoting/client/key_event_mapper.h"
+#include "remoting/client/plugin/main_plugin_thread_task_runner.h"
 #include "remoting/client/plugin/pepper_cursor_setter.h"
 #include "remoting/client/plugin/pepper_input_handler.h"
-#include "remoting/client/plugin/pepper_plugin_thread_delegate.h"
 #include "remoting/client/plugin/pepper_video_renderer.h"
 #include "remoting/client/touch_input_scaler.h"
 #include "remoting/proto/event.pb.h"
@@ -243,8 +243,7 @@ class ChromotingInstance : public ClientUserInterface,
 
   bool initialized_;
 
-  PepperPluginThreadDelegate plugin_thread_delegate_;
-  scoped_refptr<PluginThreadTaskRunner> plugin_task_runner_;
+  scoped_refptr<MainPluginThreadTaskRunner> plugin_task_runner_;

[Wez, 2015/10/20 23:05:48]

Does the ChromotingInstance need to know that this is a
MainPluginThreadTaskRunner, or could it hold it as a SingleThreadTaskRunner or
even TaskRunner, to avoid spreading that implementation detail?

[Sergey Ulanov, 2015/10/20 23:28:05]

Done.

   scoped_ptr<base::ThreadTaskRunnerHandle> thread_task_runner_handle_;
   scoped_ptr<jingle_glue::JingleThreadWrapper> thread_wrapper_;
   ClientContext context_;