Remove usage of FOR_EACH_OBSERVER macro in ui/app_list

ui/app_list/pagination_model.cc

 // Copyright (c) 2012 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 "ui/app_list/pagination_model.h"
 
 #include <algorithm>
 
 #include "ui/app_list/pagination_model_observer.h"
 #include "ui/gfx/animation/slide_animation.h"
@@ skipping 15 matching lines @@
 
 void PaginationModel::SetTotalPages(int total_pages) {
   if (total_pages == total_pages_)
     return;
 
   total_pages_ = total_pages;
   if (selected_page_ < 0)
     SelectPage(0, false /* animate */);
   if (selected_page_ >= total_pages_)
     SelectPage(std::max(total_pages_ - 1, 0), false /* animate */);
-  FOR_EACH_OBSERVER(PaginationModelObserver, observers_, TotalPagesChanged());
+  for (auto& observer : observers_)
+    observer.TotalPagesChanged();
 }
 
 void PaginationModel::SelectPage(int page, bool animate) {
   if (animate) {
     // -1 and |total_pages_| are valid target page for animation.
     DCHECK(page >= -1 && page <= total_pages_);
 
     if (!transition_animation_) {
       if (page == selected_page_)
         return;
@@ skipping 143 matching lines @@
   // return that eventual page.
   if (pending_selected_page_ >= 0)
     return pending_selected_page_;
 
   // Just the target of the current animation.
   return transition_.target_page;
 }
 
 void PaginationModel::NotifySelectedPageChanged(int old_selected,
                                                 int new_selected) {
-  FOR_EACH_OBSERVER(PaginationModelObserver,
-                    observers_,
-                    SelectedPageChanged(old_selected, new_selected));
+  for (auto& observer : observers_)
+    observer.SelectedPageChanged(old_selected, new_selected);
 }
 
 void PaginationModel::NotifyTransitionStarted() {
-  FOR_EACH_OBSERVER(PaginationModelObserver, observers_, TransitionStarted());
+  for (auto& observer : observers_)
+    observer.TransitionStarted();
 }
 
 void PaginationModel::NotifyTransitionChanged() {
-  FOR_EACH_OBSERVER(PaginationModelObserver, observers_, TransitionChanged());
+  for (auto& observer : observers_)
+    observer.TransitionChanged();
 }
 
 int PaginationModel::CalculateTargetPage(int delta) const {
   DCHECK_GT(total_pages_, 0);
   const int target_page = SelectedTargetPage() + delta;
 
   int start_page = 0;
   int end_page = total_pages_ - 1;
 
   // Use invalid page when |selected_page_| is at ends.
@@ skipping 53 matching lines @@
   } else if (transition_animation_->GetCurrentValue() == 0) {
     // Hiding animation ends. No page change should happen.
     ResetTransitionAnimation();
   }
 
   if (next_target >= 0)
     SelectPage(next_target, true);
 }
 
 }  // namespace app_list