Revert of Straightens outs DEPS in mojo/common

mojo/message_pump/time_helper.cc

Index: mojo/message_pump/time_helper.cc
diff --git a/mojo/message_pump/time_helper.cc b/mojo/message_pump/time_helper.cc
deleted file mode 100644
index ffd667e47d7e676e933f9aab4f9bb84e41e1f99a..0000000000000000000000000000000000000000
--- a/mojo/message_pump/time_helper.cc
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "mojo/message_pump/time_helper.h"
-
-#include "base/time/tick_clock.h"
-
-namespace mojo {
-namespace common {
-
-namespace {
-
-base::TickClock* tick_clock = NULL;
-
-}  // namespace
-
-namespace test {
-
-void SetTickClockForTest(base::TickClock* clock) {
-  tick_clock = clock;
-}
-}  // namespace test
-
-namespace internal {
-
-base::TimeTicks NowTicks() {
-  return tick_clock ? tick_clock->NowTicks() : base::TimeTicks::Now();
-}
-
-}  // namespace internal
-}  // namespace common
-}  // namespace mojo