Remove breakpad from skip_child_includes.

Change-Id: Idba04cf28ac6ece89f23e9b83005d508b37818c8
Reviewed-on: https://chromium-review.googlesource.com/1132566Reviewed-by: Robert Sesek <rsesek@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#574206}

DEPS

@@ -1392,7 +1392,6 @@ skip_child_includes = [
   'skia',
   'testing',
   'third_party/abseil-cpp',
-  'third_party/breakpad/breakpad',
   'v8',
 ]