Move navigation and frame tree classes to a new frame_host/ directory.

content/browser/renderer_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/renderer_host/frame_tree_node.h"
-
-#include <queue>
-
-#include "base/stl_util.h"
-#include "content/browser/renderer_host/render_frame_host_impl.h"
-
-namespace content {
-
-const int64 FrameTreeNode::kInvalidFrameId = -1;
-
-FrameTreeNode::FrameTreeNode(int64 frame_id, const std::string& name,
-                             scoped_ptr<RenderFrameHostImpl> render_frame_host)
-  : frame_id_(frame_id),
-    frame_name_(name),
-    owns_render_frame_host_(true),
-    render_frame_host_(render_frame_host.release()) {
-}
-
-FrameTreeNode::~FrameTreeNode() {
-  if (owns_render_frame_host_)
-    delete render_frame_host_;
-}
-
-void FrameTreeNode::AddChild(scoped_ptr<FrameTreeNode> child) {
-  children_.push_back(child.release());
-}
-
-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);
-}
-
-void FrameTreeNode::ResetForMainFrame(
-    RenderFrameHostImpl* new_render_frame_host) {
-  DCHECK_EQ(0UL, children_.size());
-
-  owns_render_frame_host_ = false;
-  frame_id_ = kInvalidFrameId;
-  current_url_ = GURL();
-  children_.clear();
-
-  render_frame_host_ = new_render_frame_host;
-}
-
-}  // namespace content