SafeJSON: Remove unneeded deps for Android builds.

Remove unneeded deps for Android builds. Some Android-based dependents
of safe_json are unable to link //content as a matter of policy, which
is creating linker errors.
* Remove //content/public/browser (don't need BrowserThread)
* Remove utility process IPC messages dep.

R=bauerb@chromium.org,rsesek@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1761943002

Cr-Commit-Position: refs/heads/master@{#379055}
1 file changed