Mojo: add support for {double,float}.{INFINITY,NEGATIVE_INFINITY,NAN}

mojo/public/tools/bindings/generators/mojom_js_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 JavaScript 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 180 matching lines @@
     # NamespaceUid.Struct[.Enum].CONSTANT_NAME
     name = []
     if token.imported_from:
       name.append(token.imported_from["unique_name"])
     if token.parent_kind:
       name.append(token.parent_kind.name)
     if isinstance(token, mojom.EnumValue):
       name.append(token.enum_name)
     name.append(token.name)
     return ".".join(name)
+
+  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";
+
   return token
 
 
 def ExpressionToText(value):
   return TranslateConstants(value)
 
 
 def IsArrayPointerField(field):
   return mojom.IsAnyArrayKind(field.kind)
 
@@ skipping 45 matching lines @@
     self.Write(self.GenerateJsModule(), "%s.js" % self.module.name)
 
   def GetImports(self):
     # Since each import is assigned a variable in JS, they need to have unique
     # names.
     counter = 1
     for each in self.module.imports:
       each["unique_name"] = "import" + str(counter)
       counter += 1
     return self.module.imports