The default value for NullableString should be null (was "")

mojo/public/tools/bindings/generators/mojom_cpp_generator.py

 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Generates C++ source files from a mojom.Module."""
 
 import mojom.generate.generator as generator
 import mojom.generate.module as mojom
 import mojom.generate.pack as pack
 from mojom.generate.template_expander import UseJinja
@@ skipping 215 matching lines @@
 
   if isinstance(token, mojom.BuiltinValue):
     if token.value == "double.INFINITY" or token.value == "float.INFINITY":
       return "INFINITY";
     if token.value == "double.NEGATIVE_INFINITY" or \
        token.value == "float.NEGATIVE_INFINITY":
       return "-INFINITY";
     if token.value == "double.NAN" or token.value == "float.NAN":
       return "NAN";
 
+  if (kind is not None and mojom.IsFloatKind(kind)):
+      return token if token.isdigit() else token + "f";
+
   return '%s%s' % (token, _kind_to_cpp_literal_suffix.get(kind, ''))
 
 def ExpressionToText(value, kind=None):
   return TranslateConstants(value, kind)
 
 def ShouldInlineStruct(struct):
   # TODO(darin): Base this on the size of the wrapper class.
   if len(struct.fields) > 4:
     return False
   for field in struct.fields:
@@ skipping 78 matching lines @@
 
   @UseJinja("cpp_templates/module.cc.tmpl", filters=cpp_filters)
   def GenerateModuleSource(self):
     return self.GetJinjaExports()
 
   def GenerateFiles(self, args):
     self.Write(self.GenerateModuleHeader(), "%s.h" % self.module.name)
     self.Write(self.GenerateModuleInternalHeader(),
         "%s-internal.h" % self.module.name)
     self.Write(self.GenerateModuleSource(), "%s.cc" % self.module.name)