Change mojo enums to be scoped enums in the generated C++ bindings.

mojo/public/tools/bindings/pylib/mojom/generate/generator.py

Index: mojo/public/tools/bindings/pylib/mojom/generate/generator.py
diff --git a/mojo/public/tools/bindings/pylib/mojom/generate/generator.py b/mojo/public/tools/bindings/pylib/mojom/generate/generator.py
index 9c225b437a010bb4cbecc6d55ad695b47661397b..0ecc615c1849f691d23a591c7e7ebc56bb38dec6 100644
--- a/mojo/public/tools/bindings/pylib/mojom/generate/generator.py
+++ b/mojo/public/tools/bindings/pylib/mojom/generate/generator.py
@@ -20,10 +20,6 @@ def ExpectedArraySize(kind):
 def StudlyCapsToCamel(studly):
   return studly[0].lower() + studly[1:]
 
-def CamelCaseToAllCaps(camel_case):
-  return '_'.join(
-      word for word in re.split(r'([A-Z][^A-Z]+)', camel_case) if word).upper()
-
 def UnderToCamel(under):
   """Converts underscore_separated strings to CamelCase strings."""
   return ''.join(word.capitalize() for word in under.split('_'))