Fix MessageLoop and RunLoop includes via script.

This is a re-run of the script used for MessageLoop @
https://codereview.chromium.org/2876013002.

And a barely tweaked version of it applied to RunLoop.

[email protected]

(which includes run_loop.h) @

Bug: Missing includes prevents removal of message_loop.h
Cq-Include-Trybots: master.tryserver.chromium.android:android_cronet_tester;master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_site_isolation;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I37cbd887744a31ba6e34046c83d6e09624ac4a93
https: //chromium-review.googlesource.com/c/chromium/src/+/638550
Reviewed-on: https://chromium-review.googlesource.com/639231
Commit-Queue: Gabriel Charette <[email protected]>
Reviewed-by: Gabriel Charette <[email protected]>
Cr-Commit-Position: refs/heads/master@{#497917}
diff --git a/ui/snapshot/snapshot_aura_unittest.cc b/ui/snapshot/snapshot_aura_unittest.cc
index bee0b0c..1f9a779 100644
--- a/ui/snapshot/snapshot_aura_unittest.cc
+++ b/ui/snapshot/snapshot_aura_unittest.cc
@@ -9,6 +9,7 @@
 
 #include "base/bind.h"
 #include "base/macros.h"
+#include "base/run_loop.h"
 #include "base/test/test_simple_task_runner.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkPixelRef.h"