Move Extension Location and Type enums to Manifest, and move InstallWarning to its own file.

chrome/browser/extensions/tab_helper.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 CHROME_BROWSER_EXTENSIONS_TAB_HELPER_H_
 #define CHROME_BROWSER_EXTENSIONS_TAB_HELPER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 111 matching lines @@
   const Extension* extension_app() const { return extension_app_; }
   bool is_app() const { return extension_app_ != NULL; }
   const WebApplicationInfo& web_app_info() const {
     return web_app_info_;
   }
 
   // If an app extension has been explicitly set for this WebContents its icon
   // is returned.
   //
   // NOTE: the returned icon is larger than 16x16 (its size is
-  // Extension::EXTENSION_ICON_SMALLISH).
+  // extension_misc::EXTENSION_ICON_SMALLISH).
   SkBitmap* GetExtensionAppIcon();
 
   content::WebContents* web_contents() const {
     return content::WebContentsObserver::web_contents();
   }
 
   ScriptExecutor* script_executor() {
     return script_executor_.get();
   }
 
@@ skipping 126 matching lines @@
 
   // Vend weak pointers that can be invalidated to stop in-progress loads.
   base::WeakPtrFactory<TabHelper> image_loader_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TabHelper);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_TAB_HELPER_H_