Remove uses of base::hash_map from //chrome

chrome/browser/command_updater.h

Index: chrome/browser/command_updater.h
diff --git a/chrome/browser/command_updater.h b/chrome/browser/command_updater.h
index 31a4e9130600e8ccf8a63cb2cda183de9361c8ce..035d2501850e41faf3b6e4dfba9e7901d9e8445e 100644
--- a/chrome/browser/command_updater.h
+++ b/chrome/browser/command_updater.h
@@ -6,8 +6,8 @@
 #define CHROME_BROWSER_COMMAND_UPDATER_H_
 
 #include <memory>
+#include <unordered_map>
 
-#include "base/containers/hash_tables.h"
 #include "base/macros.h"
 #include "ui/base/window_open_disposition.h"
 
@@ -77,7 +77,7 @@ class CommandUpdater {
   CommandUpdaterDelegate* delegate_;
 
   // This is a map of command IDs to states and observer lists
-  base::hash_map<int, std::unique_ptr<Command>> commands_;
+  std::unordered_map<int, std::unique_ptr<Command>> commands_;
 
   DISALLOW_COPY_AND_ASSIGN(CommandUpdater);
 };