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This is build dependency optimization for the build like below
https://chromium-build-stats.appspot.com/ninja_log/2018/04/02/win75-c4/ninja_log.win75-c4.chrome-bot.20180402-000428.8888.gz/trace.html from https://ci.chromium.org/buildbot/tryserver.chromium.win/win7_chromium_rel_ng/135170
obj files for browser_tests compiled around 215s~245s wait remoting/webapp unnecessarily.

Change-Id: I47fecd63b063382fde5e4c200f378eff7563521e
Reviewed-on: https://chromium-review.googlesource.com/989855Reviewed-by: Jamie Walch <jamiewalch@chromium.org>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#547554}