Reland 'Convert //net and //chromecast to std::unordered_*'

chromecast/common/cast_resource_delegate.h

Index: chromecast/common/cast_resource_delegate.h
diff --git a/chromecast/common/cast_resource_delegate.h b/chromecast/common/cast_resource_delegate.h
index a70ef978736a1d8dbcd8b60180e3628626519ed7..7aa2f1c54c2c26a71d72c7252bc6987390172ccd 100644
--- a/chromecast/common/cast_resource_delegate.h
+++ b/chromecast/common/cast_resource_delegate.h
@@ -7,6 +7,7 @@
 
 #include <memory>
 #include <string>
+#include <unordered_map>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted_memory.h"
@@ -56,7 +57,7 @@ class CastResourceDelegate : public ui::ResourceBundle::Delegate {
   void ClearAllExtraLocalizedStrings();
 
  private:
-  typedef base::hash_map<int, base::string16> ExtraLocaledStringMap;
+  using ExtraLocaledStringMap = std::unordered_map<int, base::string16>;
 
   ExtraLocaledStringMap extra_localized_strings_;