John Budorick 6c9a786c60 Add //base dependency to rtc_base:rtc_event when building with chromium.
Should fix flakes of the form:

In file included from ../../third_party/webrtc/rtc_base/platform_thread.cc:11:
In file included from ../../third_party/webrtc\rtc_base/platform_thread.h:17:
In file included from ../../third_party/webrtc_overrides\rtc_base/event.h:9:
In file included from ../..\base/synchronization/waitable_event.h:15:
In file included from ../..\base/win/scoped_handle.h:12:
../..\base/location.h(14,10):  fatal error: 'base/debug/debugging_buildflags.h' file not found
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Bug: chromium:799759
Change-Id: I24a329e944c3ec8324057d882f96648c10198022
Reviewed-on: https://webrtc-review.googlesource.com/64388
Reviewed-by: Oleh Prypin <oprypin@webrtc.org>
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Commit-Queue: Oleh Prypin <oprypin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22608}
2018-03-26 14:55:50 +00:00
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