Extract ProcessManager from ExtensionSystem.

extensions/browser/extension_system.h

 // Copyright 2014 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 EXTENSIONS_BROWSER_EXTENSION_SYSTEM_H_
 #define EXTENSIONS_BROWSER_EXTENSION_SYSTEM_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
@@ skipping 62 matching lines @@
   virtual RuntimeData* runtime_data() = 0;
 
   // The class controlling whether users are permitted to perform certain
   // actions on extensions (install, uninstall, disable, etc.).
   // The ManagementPolicy is created at startup.
   virtual ManagementPolicy* management_policy() = 0;
 
   // The SharedUserScriptMaster is created at startup.
   virtual SharedUserScriptMaster* shared_user_script_master() = 0;
 
-  // The ProcessManager is created at startup.
-  virtual ProcessManager* process_manager() = 0;
-
   // The StateStore is created at startup.
   virtual StateStore* state_store() = 0;
 
   // The rules store is created at startup.
   virtual StateStore* rules_store() = 0;
 
   // Returns the IO-thread-accessible extension data.
   virtual InfoMap* info_map() = 0;
 
   // The LazyBackgroundTaskQueue is created at startup.
@@ skipping 47 matching lines @@
 
   // Get the user script master for declarative scripts, if any.
   virtual DeclarativeUserScriptMaster*
       GetDeclarativeUserScriptMasterByExtension(
           const ExtensionId& extension_id) = 0;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_SYSTEM_H_