Revert of Move core web_view code to extensions.

chrome/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 CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_RENDERER_STATE_H_
+#define CHROME_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  // CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_RENDERER_STATE_H_