Support sharing of ContentMain and BrowserMain code with embedded use cases (try #3).

content/browser/browser_main_loop.h

Index: content/browser/browser_main_loop.h
===================================================================
--- content/browser/browser_main_loop.h	(revision 121246)
+++ content/browser/browser_main_loop.h	(working copy)
@@ -44,24 +44,30 @@
   void EarlyInitialization();
   void InitializeToolkit();
   void MainMessageLoopStart();
-  void RunMainMessageLoopParts(bool* completed_main_message_loop);
-  void MainMessageLoopRun();
 
+  // Create all secondary threads.
+  void CreateThreads();
+
+  // Perform the default message loop run logic.
+  void RunMainMessageLoopParts();
+
+  // Performs the shutdown sequence, starting with PostMainMessageLoopRun
+  // through stopping threads to PostDestroyThreads.
+  void ShutdownThreadsAndCleanUp();
+
   int GetResultCode() const { return result_code_; }
 
  private:
   // For ShutdownThreadsAndCleanUp.
   friend class BrowserShutdownImpl;
 
-  // Performs the shutdown sequence, starting with PostMainMessageLoopRun
-  // through stopping threads to PostDestroyThreads.
-  void ShutdownThreadsAndCleanUp();
-
   void InitializeMainThread();
 
   // Called right after the browser threads have been started.
   void BrowserThreadsStarted();
 
+  void MainMessageLoopRun();
+
   // Members initialized on construction ---------------------------------------
   const content::MainFunctionParams& parameters_;
   const CommandLine& parsed_command_line_;