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

ppapi/tests/test_paint_aggregator.h

Index: ppapi/tests/test_paint_aggregator.h
diff --git a/ppapi/tests/test_paint_aggregator.h b/ppapi/tests/test_paint_aggregator.h
index 8649ee297b8e488e4fc2eb0720dda4feea35d5c4..9b83eec4f7aed266ca92e8601a575a4b7de1eab4 100644
--- a/ppapi/tests/test_paint_aggregator.h
+++ b/ppapi/tests/test_paint_aggregator.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -13,7 +13,7 @@ class TestPaintAggregator : public TestCase {
 
   // TestCase implementation.
   virtual bool Init();
-  virtual void RunTest();
+  virtual void RunTests(const std::string& filter);
 
  private:
   std::string TestInitialState();