Break dependency on core from generated mojom.js files

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
 
 _kind_to_javascript_default_value = {
   mojom.BOOL:         "false",
   mojom.INT8:         "0",
   mojom.UINT8:        "0",
   mojom.INT16:        "0",
   mojom.UINT16:       "0",
   mojom.INT32:        "0",
   mojom.UINT32:       "0",
   mojom.FLOAT:        "0",
-  mojom.HANDLE:       "core.kInvalidHandle",
-  mojom.DCPIPE:       "core.kInvalidHandle",
-  mojom.DPPIPE:       "core.kInvalidHandle",
-  mojom.MSGPIPE:      "core.kInvalidHandle",
-  mojom.SHAREDBUFFER: "core.kInvalidHandle",
+  mojom.HANDLE:       "null",
+  mojom.DCPIPE:       "null",
+  mojom.DPPIPE:       "null",
+  mojom.MSGPIPE:      "null",
+  mojom.SHAREDBUFFER: "null",
   mojom.INT64:        "0",
   mojom.UINT64:       "0",
   mojom.DOUBLE:       "0",
   mojom.STRING:       '""',
 }
 
 
 def JavaScriptDefaultValue(field):
   if field.default:
     raise Exception("Default values should've been handled in jinja.")
@@ skipping 139 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