Support sharing of ContentMain and BrowserMain code with embedded use cases.

content/public/browser/browser_main_parts.h

 // Copyright (c) 2011 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_BROWSER_BROWSER_MAIN_PARTS_H_
 #define CONTENT_PUBLIC_BROWSER_BROWSER_MAIN_PARTS_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/browser_thread.h"
 
+class MessageLoop;
+
 namespace content {
 
 // This class contains different "stages" to be executed by |BrowserMain()|,
 // Each stage is represented by a single BrowserMainParts method, called from
 // the corresponding method in |BrowserMainLoop| (e.g., EarlyInitialization())
 // which does the following:
 //  - calls a method (e.g., "PreEarlyInitialization()") which implements
 //    platform / tookit specific code for that stage.
 //  - calls various methods for things common to all platforms (for that stage).
 //  - calls a method (e.g., "PostEarlyInitialization()") for platform-specific
@@ skipping 30 matching lines @@
  public:
   BrowserMainParts() {}
   virtual ~BrowserMainParts() {}
 
   virtual void PreEarlyInitialization() = 0;
 
   virtual void PostEarlyInitialization() = 0;
 
   virtual void PreMainMessageLoopStart() = 0;
 
+  // Return the main message loop object or NULL to use the default message
+  // loop object.
+  virtual MessageLoop* GetMainMessageLoop() = 0;

[jam, 2012/01/12 18:07:18]

I'm not sure I understand this. I thought CEF/Awesomium wanted to just call
everything before running the message loop, and then they'll pump whenever they
want, and then when they want to quit they'll call everything currently after
running the ML? In that case, you wouldn't want to give a custom ML?

+
   virtual void PostMainMessageLoopStart() = 0;
 
   // Allows an embedder to do any extra toolkit initialization.
   virtual void ToolkitInitialized() = 0;
 
   // Called just before any child threads owned by the content
   // framework are created.
   //
   // The main message loop has been started at this point (but has not
   // been run), and the toolkit has been initialized.
@@ skipping 16 matching lines @@
   // stopped and destroyed.
   virtual void PostDestroyThreads() = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BrowserMainParts);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_BROWSER_MAIN_PARTS_H_