Create a new RenderFrameHost per child frame when --site-per-process is enabled.

content/browser/web_contents/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/web_contents/frame_tree_node.h"
-
-#include <queue>
-
-#include "base/stl_util.h"
-
-namespace content {
-
-FrameTreeNode::FrameTreeNode(int64 frame_id, const std::string& name)
-  : frame_id_(frame_id),
-    frame_name_(name) {
-}
-
-FrameTreeNode::~FrameTreeNode() {
-}
-
-void FrameTreeNode::AddChild(FrameTreeNode* child) {
-  children_.push_back(child);
-}
-
-void FrameTreeNode::RemoveChild(int64 child_id) {
-  std::vector<FrameTreeNode*>::iterator iter;
-
-  for (iter = children_.begin(); iter != children_.end(); ++iter) {
-    if ((*iter)->frame_id() == child_id)
-      break;
-  }
-
-  if (iter != children_.end())
-    children_.erase(iter);
-}
-
-}  // namespace content