Move file_handlers API from //chrome to //extensions

extensions/browser/api/file_handlers/directory_util.h

 // Copyright 2016 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_FILE_HANDLERS_DIRECTORY_UTIL_H_
-#define CHROME_BROWSER_EXTENSIONS_API_FILE_HANDLERS_DIRECTORY_UTIL_H_
+#ifndef EXTENSIONS_BROWSER_API_FILE_HANDLERS_DIRECTORY_UTIL_H_
+#define EXTENSIONS_BROWSER_API_FILE_HANDLERS_DIRECTORY_UTIL_H_
 
 #include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 
-class Profile;
+namespace content {
+class BrowserContext;
+}
 
 namespace base {
 class FilePath;
 }  // namespace base
 
 namespace extensions {
 namespace app_file_handler_util {
 
 class IsDirectoryCollector {
  public:
   typedef base::Callback<void(std::unique_ptr<std::set<base::FilePath>>)>
       CompletionCallback;
 
-  explicit IsDirectoryCollector(Profile* profile);
+  explicit IsDirectoryCollector(content::BrowserContext* context);
   virtual ~IsDirectoryCollector();
 
   // For the given paths obtains a set with which of them are directories.
   // The collector does not support virtual files if OS != CHROMEOS.
   void CollectForEntriesPaths(const std::vector<base::FilePath>& paths,
                               const CompletionCallback& callback);
 
  private:
   void OnIsDirectoryCollected(size_t index, bool directory);
 
-  Profile* profile_;
+  content::BrowserContext* context_;
   std::vector<base::FilePath> paths_;
   std::unique_ptr<std::set<base::FilePath>> result_;
   size_t left_;
   CompletionCallback callback_;
   base::WeakPtrFactory<IsDirectoryCollector> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IsDirectoryCollector);
 };
 
 }  // namespace app_file_handler_util
 }  // namespace extensions
 
-#endif  // CHROME_BROWSER_EXTENSIONS_API_FILE_HANDLERS_DIRECTORY_UTIL_H_
+#endif  // EXTENSIONS_BROWSER_API_FILE_HANDLERS_DIRECTORY_UTIL_H_