Lazily initialize MessageLoop for faster thread startup

content/public/test/test_browser_thread.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_TEST_TEST_BROWSER_THREAD_H_
 #define CONTENT_PUBLIC_TEST_TEST_BROWSER_THREAD_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 18 matching lines @@
   ~TestBrowserThread();
 
   // We provide a subset of the capabilities of the Thread interface
   // to enable certain unit tests.  To avoid a stronger dependency of
   // the internals of BrowserThread, we do not provide the full Thread
   // interface.
 
   // Starts the thread with a generic message loop.
   bool Start();
 
+  // Starts the thread with a generic message loop and waits for the
+  // thread to run.
+  bool StartAndWaitForTesting();
+
   // Starts the thread with an IOThread message loop.
   bool StartIOThread();
 
   // Stops the thread.
   void Stop();
 
   // Returns true if the thread is running.
   bool IsRunning();
 
   // Returns a Thread pointer for the thread. This should not be used
   // in new tests.
   base::Thread* DeprecatedGetThreadObject();
 
  private:
   scoped_ptr<TestBrowserThreadImpl> impl_;
 
   DISALLOW_COPY_AND_ASSIGN(TestBrowserThread);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_TEST_BROWSER_THREAD_H_