Remove uses of base::hash_map from //chrome

chrome/browser/chromeos/settings/cros_settings.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_CHROMEOS_SETTINGS_CROS_SETTINGS_H_
 #define CHROME_BROWSER_CHROMEOS_SETTINGS_CROS_SETTINGS_H_
 
+#include <map>
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/callback_list.h"
-#include "base/containers/hash_tables.h"
 #include "base/macros.h"
 #include "base/sequence_checker.h"
 #include "chromeos/settings/cros_settings_names.h"
 #include "chromeos/settings/cros_settings_provider.h"
 
 namespace base {
 class DictionaryValue;
 class ListValue;
 class Value;
 }
@@ skipping 99 matching lines @@
   friend class CrosSettingsTest;
 
   // Fires system setting change callback.
   void FireObservers(const std::string& path);
 
   // List of ChromeOS system settings providers.
   std::vector<std::unique_ptr<CrosSettingsProvider>> providers_;
 
   // A map from settings names to a list of observers. Observers get fired in
   // the order they are added.
-  base::hash_map<std::string, std::unique_ptr<base::CallbackList<void(void)>>>
+  std::map<std::string, std::unique_ptr<base::CallbackList<void(void)>>>
       settings_observers_;
 
   SEQUENCE_CHECKER(sequence_checker_);
 
   DISALLOW_COPY_AND_ASSIGN(CrosSettings);
 };
 
 // Helper class for tests. Initializes the CrosSettings singleton on
 // construction and tears it down again on destruction.
 class ScopedTestCrosSettings {
  public:
   ScopedTestCrosSettings();
   ~ScopedTestCrosSettings();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ScopedTestCrosSettings);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_SETTINGS_CROS_SETTINGS_H_