Extract chrome.runtime API code from extensions::EventRouter

extensions/browser/extensions_browser_client.h

 // Copyright 2013 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_EXTENSIONS_BROWSER_CLIENT_H_
 #define EXTENSIONS_BROWSER_EXTENSIONS_BROWSER_CLIENT_H_
 
 namespace content {
 class BrowserContext;
 }
 
 namespace extensions {
 
-class ExtensionPrefs;
-
 // Interface to allow the extensions module to make browser-process-specific
 // queries of the embedder. Should be Set() once in the browser process.
 //
 // NOTE: Methods that do not require knowledge of browser concepts should be
 // added in ExtensionsClient (extensions/common/extensions_client.h) even if
 // they are only used in the browser process.
 class ExtensionsBrowserClient {
  public:
   virtual ~ExtensionsBrowserClient() {}
 
@@ skipping 22 matching lines @@
   // |context| is not incognito.
   virtual content::BrowserContext* GetOriginalContext(
       content::BrowserContext* context) = 0;
 
   // Returns true if loading background pages should be deferred.
   virtual bool DeferLoadingBackgroundHosts(
       content::BrowserContext* context) const = 0;
 
   // Returns true if the client version has updated since the last run. Called
   // once each time the extensions system is loaded per browser_context. The
-  // implementation may wish to use |extension_prefs| to record the current
-  // version for later comparison. |extension_prefs| may be NULL in tests.
-  virtual bool DidVersionUpdate(ExtensionPrefs* extension_prefs) = 0;
+  // implementation may wish to use the BrowserContext to record the current
+  // version for later comparison.
+  virtual bool DidVersionUpdate(content::BrowserContext* context) = 0;
 
   // Returns the single instance of |this|.
   static ExtensionsBrowserClient* Get();
 
   // Initialize the single instance.
   static void Set(ExtensionsBrowserClient* client);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_EXTENSIONS_BROWSER_CLIENT_H_