Support default values for arrays of POD data types in mojom.

mojo/public/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
 import mojom_pack
 import mojom_generator
 
@@ skipping 15 matching lines @@
   mojom.MSGPIPE: "core.kInvalidHandle",
   mojom.INT64:   "0",
   mojom.UINT64:  "0",
   mojom.DOUBLE:  "0",
   mojom.STRING:  '""',
 }
 
 
 def JavaScriptDefaultValue(field):
   if field.default:
-    return field.default
+    if isinstance(field.default, list):
+      # TODO(mpcomplete): This will need to be more sophisticated to support
+      # arrays of objects/arrays.
+      return "[" + ", ".join(field.default) + "]"
+    else:
+      return field.default
   if field.kind in mojom.PRIMITIVES:
     return _kind_to_javascript_default_value[field.kind]
   if isinstance(field.kind, mojom.Struct):
     return "null";
   if isinstance(field.kind, mojom.Array):
     return "[]";
 
 
 def JavaScriptPayloadSize(packed):
   packed_fields = packed.packed_fields
@@ skipping 106 matching lines @@
   @UseJinja("js_templates/module.js.tmpl", filters=js_filters)
   def GenerateJsModule(self):
     return {
       "enums": self.module.enums,
       "structs": self.GetStructs() + self.GetStructsFromMethods(),
       "interfaces": self.module.interfaces,
     }
 
   def GenerateFiles(self):
     self.Write(self.GenerateJsModule(), "%s.js" % self.module.name)