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      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_EXTENSIONS_EXTERNAL_COMPONENT_LOADER_H_
      6 #define CHROME_BROWSER_EXTENSIONS_EXTERNAL_COMPONENT_LOADER_H_
      7 
      8 #include <string>
      9 
     10 #include "base/compiler_specific.h"
     11 #include "chrome/browser/extensions/external_loader.h"
     12 #include "chrome/browser/profiles/profile.h"
     13 
     14 namespace extensions {
     15 
     16 class Extension;
     17 
     18 // A specialization of the ExternalLoader that loads a hard-coded list of
     19 // external extensions, that should be considered components of chrome (but
     20 // unlike Component extensions, these extensions are installed from the webstore
     21 // and don't get access to component only APIs.
     22 // Instances of this class are expected to be created and destroyed on the UI
     23 // thread and they are expecting public method calls from the UI thread.
     24 class ExternalComponentLoader : public ExternalLoader {
     25  public:
     26   explicit ExternalComponentLoader(Profile* profile);
     27 
     28   // True if |extension| should be modifiable by the user.
     29   static bool IsModifiable(const extensions::Extension* extension);
     30 
     31  protected:
     32   virtual void StartLoading() OVERRIDE;
     33 
     34  private:
     35   friend class base::RefCountedThreadSafe<ExternalLoader>;
     36   virtual ~ExternalComponentLoader();
     37 
     38   // The profile that this loader is associated with. It listens for
     39   // preference changes for that profile.
     40   Profile* profile_;
     41   DISALLOW_COPY_AND_ASSIGN(ExternalComponentLoader);
     42 };
     43 
     44 }  // namespace extensions
     45 
     46 #endif  // CHROME_BROWSER_EXTENSIONS_EXTERNAL_COMPONENT_LOADER_H_
     47