Reduce usage of FOR_EACH_OBSERVER macro in content/browser

content/browser/frame_host/frame_tree_node.cc

 // Copyright 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/frame_host/frame_tree_node.h"
 
 #include <queue>
 #include <utility>
 
 #include "base/macros.h"
@@ skipping 103 matching lines @@
 
   RecordUniqueNameLength(unique_name.size());
 
   // Note: this should always be done last in the constructor.
   blame_context_.Initialize();
 }
 
 FrameTreeNode::~FrameTreeNode() {
   std::vector<std::unique_ptr<FrameTreeNode>>().swap(children_);
   frame_tree_->FrameRemoved(this);
-  FOR_EACH_OBSERVER(Observer, observers_, OnFrameTreeNodeDestroyed(this));
+  for (auto& observer : observers_)
+    observer.OnFrameTreeNodeDestroyed(this);
 
   if (opener_)
     opener_->RemoveObserver(opener_observer_.get());
 
   g_frame_tree_node_id_map.Get().erase(frame_tree_node_id_);
 }
 
 void FrameTreeNode::AddObserver(Observer* observer) {
   observers_.AddObserver(observer);
 }
@@ skipping 323 matching lines @@
   // mode.
   if (!IsMainFrame())
     return true;
 
   render_manager_.Stop();
   return true;
 }
 
 void FrameTreeNode::DidFocus() {
   last_focus_time_ = base::TimeTicks::Now();
-  FOR_EACH_OBSERVER(Observer, observers_, OnFrameTreeNodeFocused(this));
+  for (auto& observer : observers_)
+    observer.OnFrameTreeNodeFocused(this);
 }
 
 void FrameTreeNode::BeforeUnloadCanceled() {
   // TODO(clamy): Support BeforeUnload in subframes.
   if (!IsMainFrame())
     return;
 
   RenderFrameHostImpl* current_frame_host =
       render_manager_.current_frame_host();
   DCHECK(current_frame_host);
@@ skipping 24 matching lines @@
       }
       return parent_->child_at(i + relative_offset);
     }
   }
 
   NOTREACHED() << "FrameTreeNode not found in its parent's children.";
   return nullptr;
 }
 
 }  // namespace content