<webview>: Implement WebRequest API

chrome/browser/webview/webview_guest.h

+// Copyright (c) 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.
+
+#ifndef CHROME_BROWSER_WEBVIEW_WEBVIEW_GUEST_H_
+#define CHROME_BROWSER_WEBVIEW_WEBVIEW_GUEST_H_
+
+#include "content/public/browser/web_contents_observer.h"
+
+namespace chrome {
+
+// A WebViewGuest is a WebContentsObserver on the guest WebContents of a
+// <webview> tag. It provides the browser-side implementation of the <webview>
+// API and manages the lifetime of <webview> extension events.
+class WebViewGuest : public content::WebContentsObserver {
+ public:
+  WebViewGuest(content::WebContents* guest_web_contents,
+               content::WebContents* embedder_web_contents,
+               const std::string& extension_id);
+
+  static WebViewGuest* From(void* profile, int instance_id);
+
+  content::WebContents* embedder_web_contents() const {
+    return embedder_web_contents_;
+  }
+
+  content::WebContents* web_contents() const {
+    return WebContentsObserver::web_contents();
+  }
+
+ private:
+  virtual ~WebViewGuest();
+  virtual void WebContentsDestroyed(
+      content::WebContents* web_contents) OVERRIDE;
+
+  content::WebContents* embedder_web_contents_;
+  const std::string extension_id_;
+  const int embedder_render_process_id_;
+  // Profile and instance ID are cached here because |web_contents()| is
+  // null on destruction.
+  void* profile_;
+  const int instance_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebViewGuest);
+};
+
+}  // namespace chrome
+
+#endif  // CHROME_BROWSER_WEBVIEW_WEBVIEW_GUEST_H_