Add new media request result MEDIA_DEVICE_FAILED_DUE_TO_SHUTDOWN.

extensions/browser/guest_view/web_view/web_view_permission_helper.cc

 // 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.
 
 #include "extensions/browser/guest_view/web_view/web_view_permission_helper.h"
 
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/user_metrics.h"
 #include "extensions/browser/api/extensions_api_client.h"
@@ skipping 178 matching lines @@
                  weak_factory_.GetWeakPtr(),
                  request,
                  callback),
       false /* allowed_by_default */);
 }
 
 bool WebViewPermissionHelper::CheckMediaAccessPermission(
     content::WebContents* source,
     const GURL& security_origin,
     content::MediaStreamType type) {
+  if (!web_view_guest()->attached() ||
+      !web_view_guest()->embedder_web_contents()->GetDelegate()) {
+    return false;
+  }
   return web_view_guest()
       ->embedder_web_contents()
       ->GetDelegate()
       ->CheckMediaAccessPermission(
           web_view_guest()->embedder_web_contents(), security_origin, type);
 }
 
 void WebViewPermissionHelper::OnMediaPermissionResponse(
     const content::MediaStreamRequest& request,
     const content::MediaResponseCallback& callback,
     bool allow,
     const std::string& user_input) {
-  if (!allow || !web_view_guest()->attached()) {
-    // Deny the request.
+  if (!allow) {
+    callback.Run(content::MediaStreamDevices(),
+                 content::MEDIA_DEVICE_PERMISSION_DENIED,
+                 scoped_ptr<content::MediaStreamUI>());
+    return;
+  }
+  if (!web_view_guest()->attached() ||
+      !web_view_guest()->embedder_web_contents()->GetDelegate()) {
     callback.Run(content::MediaStreamDevices(),
                  content::MEDIA_DEVICE_INVALID_STATE,
                  scoped_ptr<content::MediaStreamUI>());
     return;
   }
-  if (!web_view_guest()->embedder_web_contents()->GetDelegate())
-    return;
 
   web_view_guest()
       ->embedder_web_contents()
       ->GetDelegate()
       ->RequestMediaAccessPermission(
           web_view_guest()->embedder_web_contents(), request, callback);
 }
 
 void WebViewPermissionHelper::CanDownload(
     content::RenderViewHost* render_view_host,
@@ skipping 149 matching lines @@
     bool allowed_by_default)
     : callback(callback),
       permission_type(permission_type),
       allowed_by_default(allowed_by_default) {
 }
 
 WebViewPermissionHelper::PermissionResponseInfo::~PermissionResponseInfo() {
 }
 
 }  // namespace extensions