Reduce FOR_EACH_OBSERVER macro usage in chrome/browser

chrome/browser/media/router/presentation_service_delegate_impl.cc

 // Copyright 2015 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 "chrome/browser/media/router/presentation_service_delegate_impl.h"
 
 #include <string>
 #include <unordered_map>
 #include <utility>
 #include <vector>
@@ skipping 604 matching lines @@
   }
   return presentation_frame.get();
 }
 
 void PresentationFrameManager::ClearDefaultPresentationRequest() {
   default_presentation_started_callback_.Reset();
   if (!default_presentation_request_)
     return;
 
   default_presentation_request_.reset();
-  FOR_EACH_OBSERVER(
-      PresentationServiceDelegateImpl::DefaultPresentationRequestObserver,
-      default_presentation_request_observers_, OnDefaultPresentationRemoved());
+  for (auto& observer : default_presentation_request_observers_)
+    observer.OnDefaultPresentationRemoved();
 }
 
 bool PresentationFrameManager::IsMainFrame(
     const RenderFrameHostId& render_frame_host_id) const {
   RenderFrameHost* main_frame = web_contents_->GetMainFrame();
   return main_frame && GetRenderFrameHostId(main_frame) == render_frame_host_id;
 }
 
 void PresentationFrameManager::SetDefaultPresentationRequest(
     const PresentationRequest& default_presentation_request) {
   if (default_presentation_request_ &&
       default_presentation_request_->Equals(default_presentation_request))
     return;
 
   default_presentation_request_.reset(
       new PresentationRequest(default_presentation_request));
-  FOR_EACH_OBSERVER(
-      PresentationServiceDelegateImpl::DefaultPresentationRequestObserver,
-      default_presentation_request_observers_,
-      OnDefaultPresentationChanged(*default_presentation_request_));
+  for (auto& observer : default_presentation_request_observers_)
+    observer.OnDefaultPresentationChanged(*default_presentation_request_);
 }
 
 void PresentationFrameManager::SetMediaRouterForTest(MediaRouter* router) {
   router_ = router;
 }
 
 PresentationServiceDelegateImpl*
 PresentationServiceDelegateImpl::GetOrCreateForWebContents(
     content::WebContents* web_contents) {
   DCHECK(web_contents);
@@ skipping 303 matching lines @@
 bool PresentationServiceDelegateImpl::HasScreenAvailabilityListenerForTest(
     int render_process_id,
     int render_frame_id,
     const MediaSource::Id& source_id) const {
   RenderFrameHostId render_frame_host_id(render_process_id, render_frame_id);
   return frame_manager_->HasScreenAvailabilityListenerForTest(
       render_frame_host_id, source_id);
 }
 
 }  // namespace media_router