Remove usage of FOR_EACH_OBSERVER macro in content/renderer

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 9e7bf6551394a6ba1232031acaa508f33036cea7..7a4a7d1df67dbeaa316c148b2096e40156e563ca 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -904,8 +904,8 @@ RenderThreadImpl::~RenderThreadImpl() {
 }
 
 void RenderThreadImpl::Shutdown() {
-  FOR_EACH_OBSERVER(
-      RenderThreadObserver, observers_, OnRenderProcessShutdown());
+  for (auto& observer : observers_)
+    observer.OnRenderProcessShutdown();
 
   if (memory_observer_) {
     message_loop()->RemoveTaskObserver(memory_observer_.get());
@@ -1417,7 +1417,8 @@ void RenderThreadImpl::IdleHandler() {
     idle_timer_.Stop();
   }
 
-  FOR_EACH_OBSERVER(RenderThreadObserver, observers_, IdleNotification());
+  for (auto& observer : observers_)
+    observer.IdleNotification();
 }
 
 int64_t RenderThreadImpl::GetIdleNotificationDelayInMs() const {
@@ -2007,7 +2008,8 @@ void RenderThreadImpl::OnPurgePluginListCache(bool reload_pages) {
   blink::resetPluginCache(reload_pages);
   blink_platform_impl_->set_plugin_refresh_allowed(true);
 
-  FOR_EACH_OBSERVER(RenderThreadObserver, observers_, PluginListChanged());
+  for (auto& observer : observers_)
+    observer.PluginListChanged();
 }
 #endif
 
@@ -2016,8 +2018,8 @@ void RenderThreadImpl::OnNetworkConnectionChanged(
     double max_bandwidth_mbps) {
   bool online = type != net::NetworkChangeNotifier::CONNECTION_NONE;
   WebNetworkStateNotifier::setOnLine(online);
-  FOR_EACH_OBSERVER(
-      RenderThreadObserver, observers_, NetworkStateChanged(online));
+  for (auto& observer : observers_)
+    observer.NetworkStateChanged(online);
   WebNetworkStateNotifier::setWebConnection(
       NetConnectionTypeToWebConnectionType(type), max_bandwidth_mbps);
 }