Include-what-you-use for ThreadTaskRunnerHandle.

This CL adds #include "base/threading/thread_task_runner_handle.h" to
any .h/.cc/.cpp/.mm file that contains the string
"ThreadTaskRunnerHandle::" on a line that doesn't start with "//" and
whose corresponding .h file doesn't already contain the include.

.h files are processed first so that the #include is not added to a
.cc/.cpp/.mm file if it is also added to the corresponding .h file.

tools/sort-headers.py was applied to affected files.

[email protected]
BUG=675631
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2596283002
Cr-Commit-Position: refs/heads/master@{#440628}
diff --git a/components/browser_sync/profile_sync_test_util.cc b/components/browser_sync/profile_sync_test_util.cc
index a64c2e3..f9f8355d 100644
--- a/components/browser_sync/profile_sync_test_util.cc
+++ b/components/browser_sync/profile_sync_test_util.cc
@@ -7,6 +7,7 @@
 #include <utility>
 
 #include "base/memory/ptr_util.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "components/bookmarks/browser/bookmark_model.h"
 #include "components/history/core/browser/history_model_worker.h"
 #include "components/history/core/browser/history_service.h"