Fetching the matching rules when control app is installed

chrome/browser/android/data_usage/data_use_tab_model.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 "chrome/browser/android/data_usage/data_use_tab_model.h"
 
 #include <stdint.h>
 
 #include "base/metrics/histogram_macros.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 247 matching lines @@
   if (!is_control_app_installed_)
     return;
   data_use_matcher_->RegisterURLRegexes(app_package_name, domain_path_regex,
                                         label);
 }
 
 void DataUseTabModel::OnControlAppInstallStateChange(
     bool is_control_app_installed) {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK_NE(is_control_app_installed_, is_control_app_installed);
-  // If external control app is installed now, rules will be fetched on the next
-  // navigation event.
+
   is_control_app_installed_ = is_control_app_installed;
   std::vector<std::string> empty;
-  if (!is_control_app_installed_)  // Clear rules.
+  if (!is_control_app_installed_) {
+    // Clear rules.
     data_use_matcher_->RegisterURLRegexes(empty, empty, empty);
+  } else {
+    // Fetch the matching rules when the app is installed.
+    data_use_matcher_->FetchMatchingRules();
+  }
 }
 
 base::TimeTicks DataUseTabModel::NowTicks() const {
   DCHECK(thread_checker_.CalledOnValidThread());
   return tick_clock_->NowTicks();
 }
 
 bool DataUseTabModel::IsCustomTabPackageMatch(SessionID::id_type tab_id) const {
   DCHECK(thread_checker_.CalledOnValidThread());
   TabEntryMap::const_iterator tab_entry_iterator = active_tabs_.find(tab_id);
@@ skipping 167 matching lines @@
         NowTicks() -
             oldest_tab_entry_iterator->second.GetLatestStartOrEndTime(),
         base::TimeDelta::FromMinutes(1), base::TimeDelta::FromHours(1), 50);
     active_tabs_.erase(oldest_tab_entry_iterator);
   }
 }
 
 }  // namespace android
 
 }  // namespace chrome