Allow script to request durable storage permission (chrome side)

content/child/permissions/permission_dispatcher.cc

Index: content/child/permissions/permission_dispatcher.cc
diff --git a/content/child/permissions/permission_dispatcher.cc b/content/child/permissions/permission_dispatcher.cc
index eb5ac4538f0f9caf86adea7769ed9ab016e18e7b..9a79872a95e4e185c80ed307badd1f637eab5453 100644
--- a/content/child/permissions/permission_dispatcher.cc
+++ b/content/child/permissions/permission_dispatcher.cc
@@ -9,6 +9,7 @@
 #include "content/public/common/service_registry.h"
 #include "third_party/WebKit/public/platform/WebURL.h"
 #include "third_party/WebKit/public/platform/modules/permissions/WebPermissionObserver.h"
+#include "third_party/WebKit/public/web/WebUserGestureIndicator.h"
 
 using blink::WebPermissionObserver;
 
@@ -26,6 +27,8 @@ PermissionName GetPermissionName(blink::WebPermissionType type) {
       return PERMISSION_NAME_PUSH_NOTIFICATIONS;
     case blink::WebPermissionTypeMidiSysEx:
       return PERMISSION_NAME_MIDI_SYSEX;
+    case blink::WebPermissionTypeDurableStorage:
+        return PERMISSION_NAME_DURABLE_STORAGE;
     default:
       // The default statement is only there to prevent compilation failures if
       // WebPermissionType enum gets extended.
@@ -105,6 +108,18 @@ PermissionDispatcher::PermissionDispatcher(ServiceRegistry* service_registry)
 PermissionDispatcher::~PermissionDispatcher() {
 }
 
+void PermissionDispatcher::requestDurablePermission(const blink::WebURL& origin,
+      blink::WebPermissionQueryCallback* callback) {
+  int request_id = pending_callbacks_.Add(
+        new CallbackInformation(callback, kNoWorkerThread));
+  GetPermissionServicePtr()->RequestPermission(
+      PERMISSION_NAME_DURABLE_STORAGE, origin.string().utf8(),
+      blink::WebUserGestureIndicator::isProcessingUserGesture(),
+      base::Bind(&PermissionDispatcher::OnQueryPermission,
+          base::Unretained(this),
+          request_id));
+}
+
 void PermissionDispatcher::queryPermission(
     blink::WebPermissionType type,
     const blink::WebURL& origin,