Make it possible to enable/disable specific ppapi tests. Migrate PostMessage tests.

ppapi/tests/test_url_util.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 PPAPI_TESTS_TEST_URL_UTIL_H_
 #define PPAPI_TESTS_TEST_URL_UTIL_H_
 
 #include "ppapi/cpp/dev/url_util_dev.h"
 #include "ppapi/tests/test_case.h"
 
 class TestURLUtil : public TestCase {
  public:
   TestURLUtil(TestingInstance* instance) : TestCase(instance), util_(NULL) {}
 
   // TestCase implementation.
   virtual bool Init();
-  virtual void RunTest();
+  virtual void RunTests(const std::string& filter);
 
  private:
   std::string TestCanonicalize();
   std::string TestResolveRelative();
   std::string TestIsSameSecurityOrigin();
   std::string TestDocumentCanRequest();
   std::string TestDocumentCanAccessDocument();
   std::string TestGetDocumentURL();
   std::string TestGetPluginInstanceURL();
 
   const pp::URLUtil_Dev* util_;
 };
 
 #endif  // PPAPI_TESTS_TEST_URL_UTIL_H_