Add pause/resume functionality to precache

components/precache/content/precache_manager_unittest.cc

 // Copyright 2013 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/precache/content/precache_manager.h"
 
 #include <stddef.h>
 
 #include <map>
 #include <set>
@@ skipping 192 matching lines @@
   EXPECT_EQ(expected_requested_urls, url_callback_.requested_urls());
 }
 
 TEST_F(PrecacheManagerTest, StartAndCancelPrecachingBeforeTopHostsCompleted) {
   EXPECT_FALSE(precache_manager_.IsPrecaching());
 
   MockHistoryService::TopHostsCallback top_hosts_callback;
   EXPECT_CALL(history_service_, TopHosts(NumTopHosts(), _))
       .WillOnce(SaveArg<1>(&top_hosts_callback));
 
-  precache_manager_.SetInControlGroup(true);
   precache_manager_.StartPrecaching(precache_callback_.GetCallback());
   EXPECT_TRUE(precache_manager_.IsPrecaching());
 
   precache_manager_.CancelPrecaching();
   EXPECT_FALSE(precache_manager_.IsPrecaching());
 
   top_hosts_callback.Run(
       history::TopHostsList(1, std::make_pair("starting-url.com", 1)));
   EXPECT_FALSE(precache_manager_.IsPrecaching());
   EXPECT_FALSE(precache_callback_.was_on_done_called());
@@ skipping 216 matching lines @@
   expected_histogram_count_map["Precache.Saved"] += 2;
 
   base::MessageLoop::current()->RunUntilIdle();
   EXPECT_THAT(histograms_.GetTotalCountsForPrefix("Precache."),
               ContainerEq(expected_histogram_count_map));
 }
 
 }  // namespace
 
 }  // namespace precache