Fix inconsistent style of WTF unit tests.

- The first argument of TEST macro should be a test target name + 'Test'.
  It's consistent with Chromium.
- Corect confusing usage of ASSERT_EQ.  Many of them should be EXPECT_EQ.
- Fix arguments order of EXPECT_EQ.  The first argument should be an expected
  result.

https://code.google.com/p/googletest/wiki/Primer

BUG=

Review URL: https://codereview.chromium.org/251463002

git-svn-id: svn://svn.chromium.org/blink/trunk@172460 bbb929c8-8fbe-4397-9dbb-9b2b20218538