Reland; WebSocket Pepper API: Add live object check to WebSocket PPAPI tests

- Add RUN_TEST_WITH_REFERENCE_CHECK macro which run a test then check leaked
 pepper objects.
- Use that macro to run all WebSocket related PPAPI unit tests
- Fix some object leak in tests found by the macro

BUG=87310
TEST=ui_tests --gtest_filter='PPAPITest.WebSocket_*'

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=114389

Review URL: http://codereview.chromium.org/8934003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@114604 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed