Make tab capture media stream requests verify that the request came from extension API

chrome/browser/extensions/extension_host.cc

 // 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.
 
 #include "chrome/browser/extensions/extension_host.h"
 
 #include <list>
 
 #include "base/bind.h"
 #include "base/memory/singleton.h"
@@ skipping 17 matching lines @@
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/prefs/prefs_tab_helper.h"
 #include "chrome/browser/ui/tab_contents/tab_contents.h"
 #include "chrome/browser/view_type_utils.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/extensions/extension_messages.h"
+#include "chrome/common/extensions/feature_switch.h"
+#include "chrome/common/extensions/request_media_access_permission_helper.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/site_instance.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_view.h"
@@ skipping 585 matching lines @@
                               initial_pos, user_gesture);
 }
 
 void ExtensionHost::RenderViewReady() {
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_EXTENSION_HOST_CREATED,
       content::Source<Profile>(profile_),
       content::Details<ExtensionHost>(this));
 }
 
+void ExtensionHost::RequestMediaAccessPermission(
+    content::WebContents* web_contents,
+    const content::MediaStreamRequest* request,
+    const content::MediaResponseCallback& callback) {
+  // For tab capture device, we require the tabCapture permission.
+  RequestMediaAccessPermissionHelper::AuthorizeRequest(
+      request,
+      callback,
+      false,
+      false,
+      FeatureSwitch::tab_capture()->IsEnabled() &&
+      extension()->HasAPIPermission(APIPermission::kTabCapture));
+}
+
 }  // namespace extensions