GitLab

To making InputMethodDescriptor simple, let me remove operators.
Also remove operator related tests because operator had been used only in tests.

BUG=None
TEST=ran all unit_tests.

Review URL: https://codereview.chromium.org/14123005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@195408 0039d316-1c4b-4281-b951-d872f2087c98