Git rid of translator_glsl dependency.

We switch to use translator in ANGLE. At the moment translator_glsl is simply a duplication of translator.

BUG=
TEST=tree
R=jamesr@chromium.org, kbr@chromium.org

Review URL: https://codereview.chromium.org/25730004

git-svn-id: svn://svn.chromium.org/blink/trunk@158835 bbb929c8-8fbe-4397-9dbb-9b2b20218538