Reduce usage of FOR_EACH_OBSERVER macro in content/browser

content/browser/tracing/tracing_controller_impl.cc

 // Copyright (c) 2013 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 "content/browser/tracing/tracing_controller_impl.h"
 
 #include "base/bind.h"
 #include "base/cpu.h"
 #include "base/files/file_util.h"
 #include "base/guid.h"
 #include "base/json/string_escape.h"
@@ skipping 514 matching lines @@
   trace_message_filters_.insert(trace_message_filter);
   if (can_cancel_watch_event()) {
     trace_message_filter->SendSetWatchEvent(watch_category_name_,
                                             watch_event_name_);
   }
   if (can_stop_tracing()) {
     trace_message_filter->SendBeginTracing(
         TraceLog::GetInstance()->GetCurrentTraceConfig());
   }
 
-  FOR_EACH_OBSERVER(TraceMessageFilterObserver, trace_message_filter_observers_,
-                    OnTraceMessageFilterAdded(trace_message_filter));
+  for (auto& observer : trace_message_filter_observers_)
+    observer.OnTraceMessageFilterAdded(trace_message_filter);
 }
 
 void TracingControllerImpl::RemoveTraceMessageFilter(
     TraceMessageFilter* trace_message_filter) {
   if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
     BrowserThread::PostTask(
         BrowserThread::UI, FROM_HERE,
         base::Bind(&TracingControllerImpl::RemoveTraceMessageFilter,
                    base::Unretained(this),
                    base::RetainedRef(trace_message_filter)));
@@ skipping 569 matching lines @@
   // Schedule the next queued dump (if applicable).
   if (!queued_memory_dump_requests_.empty()) {
     BrowserThread::PostTask(
         BrowserThread::UI, FROM_HERE,
         base::Bind(&TracingControllerImpl::PerformNextQueuedGlobalMemoryDump,
                    base::Unretained(this)));
   }
 }
 
 }  // namespace content