Revert "Move ExtensionCache to //extensions"

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_
 
 #include <string>
 #include <vector>
 
@@ skipping 20 matching lines @@
 class URLRequest;
 class URLRequestJob;
 }
 
 namespace extensions {
 
 class ApiActivityMonitor;
 class AppSorting;
 class ComponentExtensionResourceManager;
 class Extension;
-class ExtensionCache;
 class ExtensionHostDelegate;
 class ExtensionPrefsObserver;
 class ExtensionSystem;
 class ExtensionSystemProvider;
 class InfoMap;
 class ProcessManagerDelegate;
 class RuntimeAPIDelegate;
 
 // Interface to allow the extensions module to make browser-process-specific
 // queries of the embedder. Should be Set() once in the browser process.
@@ skipping 129 matching lines @@
   GetComponentExtensionResourceManager() = 0;
 
   // Propagate a event to all the renderers in every browser context. The
   // implementation must be safe to call from any thread.
   virtual void BroadcastEventToRenderers(const std::string& event_name,
                                          scoped_ptr<base::ListValue> args) = 0;
 
   // Returns the embedder's net::NetLog.
   virtual net::NetLog* GetNetLog() = 0;
 
-  // Gets the single ExtensionCache instance shared across the browser process.
-  virtual ExtensionCache* GetExtensionCache() = 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_