Revert of Move core web_view code to extensions.

extensions/browser/guest_view/web_view/web_view_renderer_state.h

-// 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.
-
-#ifndef EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_RENDERER_STATE_H_
-#define EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_RENDERER_STATE_H_
-
-#include <map>
-#include <string>
-#include <utility>
-
-#include "base/memory/singleton.h"
-
-namespace extensions {
-
-class WebViewGuest;
-
-// This class keeps track of <webview> renderer state for use on the IO thread.
-// All methods should be called on the IO thread.
-class WebViewRendererState {
- public:
-  struct WebViewInfo {
-    int embedder_process_id;
-    int instance_id;
-    std::string partition_id;
-    std::string embedder_extension_id;
-  };
-
-  static WebViewRendererState* GetInstance();
-
-  // Looks up the information for the embedder <webview> for a given render
-  // view, if one exists. Called on the IO thread.
-  bool GetInfo(int guest_process_id, int guest_routing_id,
-               WebViewInfo* webview_info);
-
-  // Looks up the partition info for the embedder <webview> for a given guest
-  // process. Called on the IO thread.
-  bool GetPartitionID(int guest_process_id, std::string* partition_id);
-
-  // Returns true if the given renderer is used by webviews.
-  bool IsGuest(int render_process_id);
-
- private:
-  friend class WebViewGuest;
-  friend struct DefaultSingletonTraits<WebViewRendererState>;
-
-  typedef std::pair<int, int> RenderId;
-  typedef std::map<RenderId, WebViewInfo> WebViewInfoMap;
-
-  struct WebViewPartitionInfo {
-    int web_view_count;
-    std::string partition_id;
-    WebViewPartitionInfo() {}
-    WebViewPartitionInfo(int count, std::string partition):
-      web_view_count(count),
-      partition_id(partition) {}
-  };
-
-  typedef std::map<int, WebViewPartitionInfo> WebViewPartitionIDMap;
-
-  WebViewRendererState();
-  ~WebViewRendererState();
-
-  // Adds or removes a <webview> guest render process from the set.
-  void AddGuest(int render_process_host_id, int routing_id,
-                const WebViewInfo& webview_info);
-  void RemoveGuest(int render_process_host_id, int routing_id);
-
-  WebViewInfoMap webview_info_map_;
-  WebViewPartitionIDMap webview_partition_id_map_;
-
-  DISALLOW_COPY_AND_ASSIGN(WebViewRendererState);
-};
-
-}  // namespace extensions
-
-#endif  // EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_RENDERER_STATE_H_