Remove uses of base::hash_map from //chrome

chrome/browser/chromeos/input_method/input_method_util.h

Index: chrome/browser/chromeos/input_method/input_method_util.h
diff --git a/chrome/browser/chromeos/input_method/input_method_util.h b/chrome/browser/chromeos/input_method/input_method_util.h
index fea1448f38070ee3c3983bd5bd8e4a9de474ed71..1a73648921d6238f4dd1d3f7e9bf90a475bdd7c0 100644
--- a/chrome/browser/chromeos/input_method/input_method_util.h
+++ b/chrome/browser/chromeos/input_method/input_method_util.h
@@ -11,7 +11,7 @@
 #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"
@@ -205,8 +205,8 @@ class InputMethodUtil {
   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_;