Remove uses of base::hash_map from //chrome

chrome/browser/chromeos/settings/cros_settings.h

Index: chrome/browser/chromeos/settings/cros_settings.h
diff --git a/chrome/browser/chromeos/settings/cros_settings.h b/chrome/browser/chromeos/settings/cros_settings.h
index adeb416adac238ccea0fa510ce1fb0851b44aeae..08453c26a5ba08b9e8c7ea6156232490b0ca7577 100644
--- a/chrome/browser/chromeos/settings/cros_settings.h
+++ b/chrome/browser/chromeos/settings/cros_settings.h
@@ -5,13 +5,13 @@
 #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/threading/non_thread_safe.h"
 #include "chromeos/settings/cros_settings_names.h"
@@ -131,7 +131,7 @@ class CrosSettings : public base::NonThreadSafe {
 
   // 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_;
 
   DISALLOW_COPY_AND_ASSIGN(CrosSettings);