<webview>: Change how plugin load works inside guests.

chrome/browser/guestview/webview/plugin_permission_helper.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_GUESTVIEW_WEBVIEW_PLUGIN_PERMISSION_HELPER_H_
+#define CHROME_BROWSER_GUESTVIEW_WEBVIEW_PLUGIN_PERMISSION_HELPER_H_
+
+#include "base/memory/weak_ptr.h"
+#include "content/public/browser/web_contents_observer.h"
+#include "content/public/browser/web_contents_user_data.h"
+
+class PluginPermissionHelper
+    : public content::WebContentsUserData<PluginPermissionHelper>,
+      public content::WebContentsObserver {
+ public:
+  virtual ~PluginPermissionHelper();
+
+ private:
+  explicit PluginPermissionHelper(content::WebContents* web_contents);
+  friend class content::WebContentsUserData<PluginPermissionHelper>;
+
+  // content::WebContentsObserver implementation.
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+
+  // Message handlers:
+  void OnBlockedUnauthorizedPlugin(const string16& name,
+                                   const std::string& identifier);
+  void OnCouldNotLoadPlugin(const base::FilePath& plugin_path);
+
+  void OnPermissionResponse(const std::string& identifier,
+                            bool allow,
+                            const std::string& user_input);
+
+  base::WeakPtrFactory<PluginPermissionHelper> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(PluginPermissionHelper);
+};
+
+#endif  // CHROME_BROWSER_GUESTVIEW_WEBVIEW_PLUGIN_PERMISSION_HELPER_H_