Reduce FOR_EACH_OBSERVER usage in ui/

ui/display/chromeos/display_configurator.cc

 // Copyright 2014 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/display/chromeos/display_configurator.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 1091 matching lines @@
   for (const auto& callback : queued_configuration_callbacks_)
     callback.Run(success);
 
   queued_configuration_callbacks_.clear();
 }
 
 void DisplayConfigurator::NotifyDisplayStateObservers(
     bool success,
     MultipleDisplayState attempted_state) {
   if (success) {
-    FOR_EACH_OBSERVER(
-        Observer, observers_, OnDisplayModeChanged(cached_displays_));
+    for (Observer& observer : observers_)
+      observer.OnDisplayModeChanged(cached_displays_);
   } else {
-    FOR_EACH_OBSERVER(
-        Observer, observers_, OnDisplayModeChangeFailed(cached_displays_,
-                                                        attempted_state));
+    for (Observer& observer : observers_)
+      observer.OnDisplayModeChangeFailed(cached_displays_, attempted_state);
   }
 }
 
 void DisplayConfigurator::NotifyPowerStateObservers() {
-  FOR_EACH_OBSERVER(
-      Observer, observers_, OnPowerStateChanged(current_power_state_));
+  for (Observer& observer : observers_)
+    observer.OnPowerStateChanged(current_power_state_);
 }
 
 int64_t DisplayConfigurator::AddVirtualDisplay(const gfx::Size& display_size) {
   if (last_virtual_display_id_ == 0xff) {
     LOG(WARNING) << "Exceeded virtual display id limit";
     return display::Display::kInvalidDisplayID;
   }
 
   DisplaySnapshotVirtual* virtual_snapshot = new DisplaySnapshotVirtual(
       display::GenerateDisplayID(kReservedManufacturerID, 0x0,
@@ skipping 26 matching lines @@
   last_virtual_display_id_ = max_display_id & 0xff;
 
   return true;
 }
 
 bool DisplayConfigurator::IsDisplayOn() const {
   return current_power_state_ != chromeos::DISPLAY_POWER_ALL_OFF;
 }
 
 }  // namespace ui