Do not spawn a thread in browser/interactive ui tests before spawning sandbox host process

net/test/embedded_test_server/embedded_test_server.h

Index: net/test/embedded_test_server/embedded_test_server.h
diff --git a/net/test/embedded_test_server/embedded_test_server.h b/net/test/embedded_test_server/embedded_test_server.h
index d5300b4fe215c160c0df11639e80864bd727e82c..68da865c27467be95a84c451c83704b1dc121d92 100644
--- a/net/test/embedded_test_server/embedded_test_server.h
+++ b/net/test/embedded_test_server/embedded_test_server.h
@@ -39,6 +39,10 @@ class HttpListenSocket : public TCPListenSocket {
   virtual void Listen();
 
  private:
+  friend class EmbeddedTestServer;
+
+  // Detaches the current from |thread_checker_|.
+  void DetachFromThread();
 
   base::ThreadChecker thread_checker_;
 };
@@ -48,7 +52,7 @@ class HttpListenSocket : public TCPListenSocket {
 // it assumes that the request syntax is correct. It *does not* support
 // a Chunked Transfer Encoding.
 //
-// The common use case is below:
+// The common use case for unit tests is below:

[oshima, 2013/11/26 02:26:02]

Forgot to mention. I'll update the comment and add another examples for browser
test case.

 //
 // base::Thread io_thread_;
 // scoped_ptr<EmbeddedTestServer> test_server_;
@@ -122,6 +126,10 @@ class EmbeddedTestServer : public StreamListenSocket::Delegate {
   // on UI thread.
   void RegisterRequestHandler(const HandleRequestCallback& callback);
 
+  // Starts/Stops IO thread that handles http requests.
+  void StartThread();
+  void StopThread();
+
  private:
   // Initializes and starts the server. If initialization succeeds, Starts()
   // will return true.