Add file thread in MessageHostContext.

remoting/host/chromoting_host_context.cc

Index: remoting/host/chromoting_host_context.cc
diff --git a/remoting/host/chromoting_host_context.cc b/remoting/host/chromoting_host_context.cc
index 783834f4465eea25fbe2264aaef518b2258daffc..74d214c88ffcf490c8dcc70645889d25aa18cef8 100644
--- a/remoting/host/chromoting_host_context.cc
+++ b/remoting/host/chromoting_host_context.cc
@@ -13,12 +13,11 @@
 namespace remoting {
 
 ChromotingHostContext::ChromotingHostContext(
-    base::MessageLoopProxy* io_message_loop,
     base::MessageLoopProxy* ui_message_loop)
     : main_thread_("ChromotingMainThread"),
       encode_thread_("ChromotingEncodeThread"),
       desktop_thread_("ChromotingDesktopThread"),
-      io_message_loop_(io_message_loop),
+      file_thread_("ChromotingFileIOThread"),
       ui_message_loop_(ui_message_loop) {
 }
 
@@ -28,21 +27,15 @@ ChromotingHostContext::~ChromotingHostContext() {
 bool ChromotingHostContext::Start() {
   // Start all the threads.
   return main_thread_.Start() && encode_thread_.Start() &&
-      jingle_thread_.Start() && desktop_thread_.Start();
+      jingle_thread_.Start() && desktop_thread_.Start() &&
+      file_thread_.StartWithOptions(
+          base::Thread::Options(MessageLoop::TYPE_IO, 0));
 }
 
 JingleThread* ChromotingHostContext::jingle_thread() {
   return &jingle_thread_;
 }
 
-base::MessageLoopProxy* ChromotingHostContext::io_message_loop() {
-  return io_message_loop_;
-}
-
-base::MessageLoopProxy* ChromotingHostContext::ui_message_loop() {
-  return ui_message_loop_;
-}
-
 MessageLoop* ChromotingHostContext::main_message_loop() {
   return main_thread_.message_loop();
 }
@@ -59,4 +52,12 @@ MessageLoop* ChromotingHostContext::desktop_message_loop() {
   return desktop_thread_.message_loop();
 }
 
+base::MessageLoopProxy* ChromotingHostContext::ui_message_loop() {
+  return ui_message_loop_;
+}
+
+MessageLoop* ChromotingHostContext::file_message_loop() {
+  return file_thread_.message_loop();
+}
+
 }  // namespace remoting