[sensors] Add Permission guard to the generic sensor apis.

content/browser/permissions/permission_service_impl.cc

Index: content/browser/permissions/permission_service_impl.cc
diff --git a/content/browser/permissions/permission_service_impl.cc b/content/browser/permissions/permission_service_impl.cc
index ccb70ff5db558f1029b1405c7b9ba84465d5f09b..eb8fce76e1fda4e9a272763cf01960f517784bd0 100644
--- a/content/browser/permissions/permission_service_impl.cc
+++ b/content/browser/permissions/permission_service_impl.cc
@@ -46,6 +46,8 @@ PermissionType PermissionDescriptorToPermissionType(
       return PermissionType::VIDEO_CAPTURE;
     case PermissionName::BACKGROUND_SYNC:
       return PermissionType::BACKGROUND_SYNC;
+    case PermissionName::SENSORS:
+      return PermissionType::SENSORS;
   }
 
   NOTREACHED();