Simplify how Content*Client interfaces are created. Instead of depending on the embedder to know wh…

content/public/app/content_main_delegate.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_APP_CONTENT_MAIN_DELEGATE_H_
 #define CONTENT_PUBLIC_APP_CONTENT_MAIN_DELEGATE_H_
 #pragma once
 
 #include <string>
 
 #include "build/build_config.h"
 #include "content/common/content_export.h"
 
 namespace content {
 
+class ContentBrowserClient;
+class ContentPluginClient;
+class ContentRendererClient;
+class ContentUtilityClient;
 class ZygoteForkDelegate;
 struct MainFunctionParams;
 
 class CONTENT_EXPORT ContentMainDelegate {
  public:
   virtual ~ContentMainDelegate() {}
 
   // Tells the embedder that the absolute basic startup has been done, i.e.
   // it's now safe to create singletons and check the command line. Return true
   // if the process should exit afterwards, and if so, |exit_code| should be
@@ skipping 35 matching lines @@
   virtual bool DelaySandboxInitialization(const std::string& process_type);
 
 #elif defined(OS_POSIX) && !defined(OS_ANDROID)
   // Tells the embedder that the zygote process is starting, and allows it to
   // specify a zygote delegate if it wishes.
   virtual ZygoteForkDelegate* ZygoteStarting();
 
   // Called every time the zygote process forks.
   virtual void ZygoteForked() {}
 #endif  // OS_MACOSX
+
+ protected:
+  friend class ContentClientInitializer;
+
+  // Called once per relevant process type to allow the embedder to customize
+  // content. If an embedder wants the default (empty) implementation, don't
+  // override this.
+  virtual ContentBrowserClient* CreateContentBrowserClient();
+  virtual ContentPluginClient* CreateContentPluginClient();
+  virtual ContentRendererClient* CreateContentRendererClient();
+  virtual ContentUtilityClient* CreateContentUtilityClient();
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_APP_CONTENT_MAIN_DELEGATE_H_