Update tests to not use to-be-removed V8 handle operations.

chrome/test/base/v8_unit_test.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_TEST_BASE_V8_UNIT_TEST_H_
 #define CHROME_TEST_BASE_V8_UNIT_TEST_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 56 matching lines @@
   // capture and hold the results for analysis by |RunJavascriptF|.
   static v8::Handle<v8::Value> ChromeSend(const v8::Arguments& args);
 
  private:
   // Executes all added javascript libraries. Returns true if no errors.
   bool ExecuteJavascriptLibraries();
 
   // Initializes paths and libraries.
   void InitPathsAndLibraries();
 
+  v8::Isolate* isolate_;
+
   // Handle scope that is used throughout the life of this class.
   v8::HandleScope handle_scope_;
 
   // Context for the JavaScript in the test.
-  v8::Handle<v8::Context> context_;
+  v8::Persistent<v8::Context> context_;
 
   // User added libraries.
   std::vector<base::FilePath> user_libraries_;
 };
 
 #endif  // CHROME_TEST_BASE_V8_UNIT_TEST_H_