Revert of Move core web_view code to extensions.

extensions/browser/guest_view/web_view/web_view_renderer_state.cc

-// Copyright 2014 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/public/browser/browser_thread.h"
-#include "extensions/browser/guest_view/web_view/web_view_renderer_state.h"
-
-using content::BrowserThread;
-
-namespace extensions {
-
-// static
-WebViewRendererState* WebViewRendererState::GetInstance() {
-  return Singleton<WebViewRendererState>::get();
-}
-
-WebViewRendererState::WebViewRendererState() {
-}
-
-WebViewRendererState::~WebViewRendererState() {
-}
-
-bool WebViewRendererState::IsGuest(int render_process_id) {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  return webview_partition_id_map_.find(render_process_id) !=
-         webview_partition_id_map_.end();
-}
-
-void WebViewRendererState::AddGuest(int guest_process_id,
-                                    int guest_routing_id,
-                                    const WebViewInfo& webview_info) {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  RenderId render_id(guest_process_id, guest_routing_id);
-  webview_info_map_[render_id] = webview_info;
-  WebViewPartitionIDMap::iterator iter =
-      webview_partition_id_map_.find(guest_process_id);
-  if (iter != webview_partition_id_map_.end()) {
-    ++iter->second.web_view_count;
-    return;
-  }
-  WebViewPartitionInfo partition_info(1, webview_info.partition_id);
-  webview_partition_id_map_[guest_process_id] = partition_info;
-}
-
-void WebViewRendererState::RemoveGuest(int guest_process_id,
-                                       int guest_routing_id) {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  RenderId render_id(guest_process_id, guest_routing_id);
-  webview_info_map_.erase(render_id);
-  WebViewPartitionIDMap::iterator iter =
-      webview_partition_id_map_.find(guest_process_id);
-  if (iter != webview_partition_id_map_.end() &&
-      iter->second.web_view_count > 1) {
-    --iter->second.web_view_count;
-    return;
-  }
-  webview_partition_id_map_.erase(guest_process_id);
-}
-
-bool WebViewRendererState::GetInfo(int guest_process_id,
-                                   int guest_routing_id,
-                                   WebViewInfo* webview_info) {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  RenderId render_id(guest_process_id, guest_routing_id);
-  WebViewInfoMap::iterator iter = webview_info_map_.find(render_id);
-  if (iter != webview_info_map_.end()) {
-    *webview_info = iter->second;
-    return true;
-  }
-  return false;
-}
-
-bool WebViewRendererState::GetPartitionID(int guest_process_id,
-                                          std::string* partition_id) {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  WebViewPartitionIDMap::iterator iter =
-      webview_partition_id_map_.find(guest_process_id);
-  if (iter != webview_partition_id_map_.end()) {
-    *partition_id = iter->second.partition_id;
-    return true;
-  }
-  return false;
-}
-
-}  // namespace extensions