Remove some unused linked_ptr.h includes in c/b/extensions/api

chrome/browser/extensions/api/developer_private/inspectable_views_finder.h

 // Copyright 2015 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_API_DEVELOPER_PRIVATE_INSPECTABLE_VIEWS_FINDER_H_
 #define CHROME_BROWSER_EXTENSIONS_API_DEVELOPER_PRIVATE_INSPECTABLE_VIEWS_FINDER_H_
 
 #include <vector>
 
 #include "base/macros.h"
-#include "base/memory/linked_ptr.h"
 #include "extensions/common/view_type.h"
 
 class Profile;
 class GURL;
 
 namespace extensions {
 class Extension;
 class ProcessManager;
 
 namespace api {
@@ skipping 43 matching lines @@
                                      ViewList* result);
 
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(InspectableViewsFinder);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_DEVELOPER_PRIVATE_INSPECTABLE_VIEWS_FINDER_H_