Remove uses of base::hash_map from //chrome

ui/base/ime/chromeos/input_method_util.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 UI_BASE_IME_CHROMEOS_INPUT_METHOD_UTIL_H_
 #define UI_BASE_IME_CHROMEOS_INPUT_METHOD_UTIL_H_
 
 #include <cstddef>
 #include <map>
 #include <memory>
 #include <string>
 #include <vector>
 
-#include "base/containers/hash_tables.h"
+#include "base/containers/flat_map.h"
 #include "base/macros.h"
 #include "base/strings/string16.h"
 #include "base/threading/thread_checker.h"
 #include "ui/base/ime/chromeos/input_method_descriptor.h"
 #include "ui/base/ime/ui_base_ime_export.h"
 
 namespace chromeos {
 namespace input_method {
 
 class InputMethodDelegate;
@@ skipping 174 matching lines @@
   // name (e.g. 'US' instead of 'US keyboard').
   base::string16 GetInputMethodLongNameInternal(
       const InputMethodDescriptor& input_method, bool short_name) const;
 
   // Map from language code to associated input method IDs, etc.
   typedef std::multimap<std::string, std::string> LanguageCodeToIdsMap;
 
   LanguageCodeToIdsMap language_code_to_ids_;
   InputMethodIdToDescriptorMap id_to_descriptor_;
 
-  typedef base::hash_map<std::string, int> HashType;
-  HashType english_to_resource_id_;
+  using EnglishToIDMap = base::flat_map<std::string, int>;
+  EnglishToIDMap english_to_resource_id_;
 
   InputMethodDelegate* delegate_;
 
   base::ThreadChecker thread_checker_;
   std::vector<std::string> hardware_layouts_;
   std::vector<std::string> hardware_login_layouts_;
   std::vector<std::string> cached_hardware_layouts_;
 
   DISALLOW_COPY_AND_ASSIGN(InputMethodUtil);
 };
 
 }  // namespace input_method
 }  // namespace chromeos
 
 #endif  // UI_BASE_IME_CHROMEOS_INPUT_METHOD_UTIL_H_