Include Frame.h from fewer generated translation units.

touching Frame.h and rebuilding:
* Before: runs 442 build steps
* After:  runs 420 build steps
* The incremental build becomes 7% faster

BUG=none

Review URL: https://codereview.chromium.org/23494036

git-svn-id: svn://svn.chromium.org/blink/trunk@157468 bbb929c8-8fbe-4397-9dbb-9b2b20218538