Reduce FOR_EACH_OBSERVER usage in ui/

ui/aura/env.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/aura/env.h"
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/threading/thread_local.h"
 #include "ui/aura/env_observer.h"
@@ skipping 18 matching lines @@
   return base::CommandLine::ForCurrentProcess()->HasSwitch(
       "primordial-pipe-token");
 }
 
 }  // namespace
 
 ////////////////////////////////////////////////////////////////////////////////
 // Env, public:
 
 Env::~Env() {
-  FOR_EACH_OBSERVER(EnvObserver, observers_, OnWillDestroyEnv());
+  for (EnvObserver& observer : observers_)
+    observer.OnWillDestroyEnv();
   DCHECK_EQ(this, lazy_tls_ptr.Pointer()->Get());
   lazy_tls_ptr.Pointer()->Set(NULL);
 }
 
 // static
 std::unique_ptr<Env> Env::CreateInstance() {
   DCHECK(!lazy_tls_ptr.Pointer()->Get());
   std::unique_ptr<Env> env(new Env());
   env->Init();
   return env;
@@ skipping 44 matching lines @@
   // The ozone platform can provide its own event source. So initialize the
   // platform before creating the default event source. If running inside mus
   // let the mus process initialize ozone instead.
   ui::OzonePlatform::InitializeForUI();
 #endif
   if (!ui::PlatformEventSource::GetInstance())
     event_source_ = ui::PlatformEventSource::CreateDefault();
 }
 
 void Env::NotifyWindowInitialized(Window* window) {
-  FOR_EACH_OBSERVER(EnvObserver, observers_, OnWindowInitialized(window));
+  for (EnvObserver& observer : observers_)
+    observer.OnWindowInitialized(window);
 }
 
 void Env::NotifyHostInitialized(WindowTreeHost* host) {
-  FOR_EACH_OBSERVER(EnvObserver, observers_, OnHostInitialized(host));
+  for (EnvObserver& observer : observers_)
+    observer.OnHostInitialized(host);
 }
 
 void Env::NotifyHostActivated(WindowTreeHost* host) {
-  FOR_EACH_OBSERVER(EnvObserver, observers_, OnHostActivated(host));
+  for (EnvObserver& observer : observers_)
+    observer.OnHostActivated(host);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // Env, ui::EventTarget implementation:
 
 bool Env::CanAcceptEvent(const ui::Event& event) {
   return true;
 }
 
 ui::EventTarget* Env::GetParentTarget() {
   return NULL;
 }
 
 std::unique_ptr<ui::EventTargetIterator> Env::GetChildIterator() const {
   return nullptr;
 }
 
 ui::EventTargeter* Env::GetEventTargeter() {
   NOTREACHED();
   return NULL;
 }
 
 }  // namespace aura