And added runloop.h alongside message_loop.h in allowed //base dependencies
in Blink platform code as RunLoop is effectively an extension of
MessageLoop and I don't see a reason not to allow it.

TBR: danakj@chromium.org (for the scripted change)
TBR: kinuko@chromium.org (for third_party\Webkit\Source\platform\DEPS tweak)
Bug: 748715
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I36c934a0f22e3ee7ff44d3efb80c6a1fe710b7b5
Reviewed-on: https://chromium-review.googlesource.com/585732


Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Gabriel Charette <gab@chromium.org>
Cr-Commit-Position: refs/heads/master@{#489617}