Always use chromium threads for IO in remoting host

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 b693f1efc2ad31dbed81b58a46694ddeab4110c6..2e3480d69d3a1c50f59421615d2aad0d494ce494 100644
--- a/remoting/host/chromoting_host_context.h
+++ b/remoting/host/chromoting_host_context.h
@@ -11,7 +11,6 @@
 #include "base/memory/ref_counted.h"
 #include "base/threading/platform_thread.h"
 #include "base/threading/thread.h"
-#include "remoting/jingle_glue/jingle_thread.h"
 
 namespace base {
 class SingleThreadTaskRunner;
@@ -39,8 +38,6 @@ class ChromotingHostContext {
   // this API.
   virtual bool Start();
 
-  virtual JingleThread* jingle_thread();
-
   // 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();
@@ -63,18 +60,6 @@ class ChromotingHostContext {
   // Can we use some other thread instead?
   virtual base::SingleThreadTaskRunner* desktop_task_runner();
 
-  // Task runner for the thread that is used for chromium's network
-  // IO, particularly all HTTP requests (for OAuth and Relay servers).
-  // Chromium's HTTP stack cannot be used on the network_task_runner()
-  // because that thread runs libjingle's message loop, while
-  // chromium's sockets must be used on a thread with a
-  // MessageLoopForIO.
-  //
-  // TODO(sergeyu): Implement socket server for libjingle that works
-  // on a regular chromium thread and use it for network_task_runner()
-  // to avoid the need for io_task_runner().
-  virtual base::SingleThreadTaskRunner* io_task_runner();
-
   // Task runner for the thread that is used for blocking file
   // IO. This thread is used by the URLRequestContext to read proxy
   // configuration and by NatConfig to read policy configs.
@@ -87,7 +72,7 @@ class ChromotingHostContext {
   FRIEND_TEST_ALL_PREFIXES(ChromotingHostContextTest, StartAndStop);
 
   // A thread that hosts all network operations.
-  JingleThread jingle_thread_;
+  base::Thread network_thread_;
 
   // A thread that hosts screen capture.
   base::Thread capture_thread_;
@@ -98,9 +83,6 @@ class ChromotingHostContext {
   // A thread that hosts input injection.
   base::Thread desktop_thread_;
 
-  // Thread for non-blocking IO operations.
-  base::Thread io_thread_;
-
   // Thread for blocking IO operations.
   base::Thread file_thread_;