Remove FOR_EACH_OBSERVER macro usage in chrome/browser/android

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/bind.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 309 matching lines @@
 bool DataUseTabModel::IsCustomTabPackageMatch(SessionID::id_type tab_id) const {
   DCHECK(thread_checker_.CalledOnValidThread());
   TabEntryMap::const_iterator tab_entry_iterator = active_tabs_.find(tab_id);
   return (tab_entry_iterator != active_tabs_.end()) &&
          tab_entry_iterator->second.is_custom_tab_package_match();
 }
 
 void DataUseTabModel::NotifyObserversOfTrackingStarting(
     SessionID::id_type tab_id) {
   DCHECK(thread_checker_.CalledOnValidThread());
-  FOR_EACH_OBSERVER(TabDataUseObserver, observers_,
-                    NotifyTrackingStarting(tab_id));
+  for (TabDataUseObserver& observer : observers_)
+    observer.NotifyTrackingStarting(tab_id);
 }
 
 void DataUseTabModel::NotifyObserversOfTrackingEnding(
     SessionID::id_type tab_id) {
   DCHECK(thread_checker_.CalledOnValidThread());
-  FOR_EACH_OBSERVER(TabDataUseObserver, observers_,
-                    NotifyTrackingEnding(tab_id));
+  for (TabDataUseObserver& observer : observers_)
+    observer.NotifyTrackingEnding(tab_id);
 }
 
 void DataUseTabModel::NotifyObserversOfDataUseTabModelReady() {
   DCHECK(thread_checker_.CalledOnValidThread());
-  FOR_EACH_OBSERVER(TabDataUseObserver, observers_, OnDataUseTabModelReady());
+  for (TabDataUseObserver& observer : observers_)
+    observer.OnDataUseTabModelReady();
 }
 
 void DataUseTabModel::GetCurrentAndNewLabelForNavigationEvent(
     SessionID::id_type tab_id,
     TransitionType transition,
     const GURL& url,
     const std::string& package,
     const content::NavigationEntry* navigation_entry,
     std::string* current_label,
     std::string* new_label,
@@ skipping 160 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