Remove the dependency on the missing file.

This causes the rebuild of some parts of WebKit code in Android WebView build.

BUG=342974
NOTRY=true

Review URL: https://codereview.chromium.org/181023003

git-svn-id: svn://svn.chromium.org/blink/trunk@167984 bbb929c8-8fbe-4397-9dbb-9b2b20218538