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

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

Index: mojo/public/tools/bindings/generators/mojom_js_generator.py
diff --git a/mojo/public/tools/bindings/generators/mojom_js_generator.py b/mojo/public/tools/bindings/generators/mojom_js_generator.py
index 5b83974d97943ec15a117e877cd978bef32a1c73..b2591cf9f751fe016a1eebe779aca4aa84913721 100644
--- a/mojo/public/tools/bindings/generators/mojom_js_generator.py
+++ b/mojo/public/tools/bindings/generators/mojom_js_generator.py
@@ -41,7 +41,7 @@ def JavaScriptDefaultValue(field):
     if mojom.IsStructKind(field.kind):
       assert field.default == "default"
       return "new %s()" % JavascriptType(field.kind)
-    return ExpressionToText(field.default)
+    return ExpressionToText(field.default, kind=field.kind)
   if field.kind in mojom.PRIMITIVES:
     return _kind_to_javascript_default_value[field.kind]
   if mojom.IsStructKind(field.kind):
@@ -138,7 +138,7 @@ def JavaScriptEncodeSnippet(kind):
     return JavaScriptEncodeSnippet(mojom.INT32)
 
 
-def TranslateConstants(token):
+def TranslateConstants(token, kind=None):
   if isinstance(token, (mojom.EnumValue, mojom.NamedValue)):
     # Both variable and enum constants are constructed like:
     # NamespaceUid.Struct[.Enum].CONSTANT_NAME
@@ -151,11 +151,20 @@ def TranslateConstants(token):
       name.append(token.enum_name)
     name.append(token.name)
     return ".".join(name)
+
+  if kind == mojom.DOUBLE or kind == mojom.FLOAT:
+    if token == "Inf" or token == "+Inf":
+      return "Infinity"
+    if token == "-Inf":
+      return "-Infinity"
+    if token == "NaN":
+      return "NaN"
+
   return token
 
 
-def ExpressionToText(value):
-  return TranslateConstants(value)
+def ExpressionToText(value, kind=None):
+  return TranslateConstants(value, kind)
 
 
 def JavascriptType(kind):