Handle integer -0 as 0 in extensions

extensions/renderer/resources/schema_utils.js

 // Copyright 2014 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.
 
 // Routines used to validate and normalize arguments.
 // TODO(benwells): unit test this file.
 
 var JSONSchemaValidator = require('json_schema').JSONSchemaValidator;
 
 var schemaValidator = new JSONSchemaValidator();
@@ skipping 100 matching lines @@
   var resolvedSignature = resolveSignature(args, definedSignature);
   if (!resolvedSignature)
     throw new Error("Invocation of form " +
         getArgumentSignatureString(funDef.name, args) +
         " doesn't match definition " +
         getParameterSignatureString(funDef.name, definedSignature));
   validate(args, resolvedSignature);
   var normalizedArgs = [];
   var ai = 0;
   for (var si = 0; si < definedSignature.length; si++) {
+    // Handle integer -0 as 0.
+    if (JSONSchemaValidator.getType(args[ai]) === "integer" && args[ai] === 0)
+      args[ai] = 0;
     if (definedSignature[si] === resolvedSignature[ai])
       $Array.push(normalizedArgs, args[ai++]);
     else
       $Array.push(normalizedArgs, null);
   }
   return normalizedArgs;
 };
 
 // Validates that a given schema for an API function is not ambiguous.
 function isFunctionSignatureAmbiguous(functionDef) {
@@ skipping 16 matching lines @@
         return true;
     }
   }
   return false;
 };
 
 exports.isFunctionSignatureAmbiguous = isFunctionSignatureAmbiguous;
 exports.normalizeArgumentsAndValidate = normalizeArgumentsAndValidate;
 exports.schemaValidator = schemaValidator;
 exports.validate = validate;