Move <webview> API to chrome layer

chrome/browser/browser_plugin/chrome_browser_plugin_guest_observer.h

+// Copyright (c) 2012 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_BROWSER_PLUGIN_CHROME_BROWSER_PLUGIN_GUEST_OBSERVER_H_
+#define CHROME_BROWSER_BROWSER_PLUGIN_CHROME_BROWSER_PLUGIN_GUEST_OBSERVER_H_
+
+#include "content/public/browser/browser_plugin/browser_plugin_guest_observer.h"
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace base {
+class ListValue;
+}  // namespace base
+
+namespace extensions {
+class Extension;
+}  // namespace extensions
+
+class ChromeBrowserPluginGuestObserver
+    : public content::BrowserPluginGuestObserver,
+      public base::RefCounted<ChromeBrowserPluginGuestObserver>  {
+ public:
+  explicit ChromeBrowserPluginGuestObserver(content::BrowserPluginGuest* guest);
+
+  virtual bool OnMessageReceivedFromEmbedder(
+      const IPC::Message& message) OVERRIDE;
+
+ private:
+  friend class base::RefCounted<ChromeBrowserPluginGuestObserver>;
+
+  virtual ~ChromeBrowserPluginGuestObserver();
+
+  virtual void OnDestruct() OVERRIDE;
+
+  // Message handlers.
+  // If possible, navigate the guest to |relative_index| entries away from the
+  // current navigation entry.
+  void OnGo(int relative_index);
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeBrowserPluginGuestObserver);
+};
+
+#endif  // CHROME_BROWSER_BROWSER_PLUGIN_CHROME_BROWSER_PLUGIN_GUEST_OBSERVER_H_