Report expected task queueing time via UMA

components/scheduler/base/test_count_uses_time_source.cc

 // Copyright 2015 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 "components/scheduler/base/test_always_fail_time_source.h"
+#include "components/scheduler/base/test_count_uses_time_source.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace scheduler {
 
-TestAlwaysFailTimeSource::TestAlwaysFailTimeSource() {
+TestCountUsesTimeSource::TestCountUsesTimeSource() : now_calls_count_(0) {}
+
+TestCountUsesTimeSource::~TestCountUsesTimeSource() {
 }
 
-TestAlwaysFailTimeSource::~TestAlwaysFailTimeSource() {
-}
-
-base::TimeTicks TestAlwaysFailTimeSource::NowTicks() {
-  ADD_FAILURE() << "NowTicks() was called!";
+base::TimeTicks TestCountUsesTimeSource::NowTicks() {
+  now_calls_count_++;
   return base::TimeTicks();
 }
 
 }  // namespace scheduler