permissions: add layout tests for multiple requests

third_party/WebKit/Source/modules/permissions/Permissions.cpp

Index: third_party/WebKit/Source/modules/permissions/Permissions.cpp
diff --git a/third_party/WebKit/Source/modules/permissions/Permissions.cpp b/third_party/WebKit/Source/modules/permissions/Permissions.cpp
index 16a05dcc3699c1541718241bad9e05e0606e116d..c1c337bccf42a784f6cda2b2a922d9792ef2d688 100644
--- a/third_party/WebKit/Source/modules/permissions/Permissions.cpp
+++ b/third_party/WebKit/Source/modules/permissions/Permissions.cpp
@@ -155,7 +155,8 @@ ScriptPromise Permissions::request(ScriptState* scriptState, const Vector<Dictio
             return promise;
     }
 
-    client->requestPermissions(*permissions, KURL(KURL(), scriptState->executionContext()->securityOrigin()->toString()), new PermissionsCallback(resolver, permissions.release()));
+    WebVector<WebPermissionType> permissionsCopy = *permissions;
+    client->requestPermissions(permissionsCopy, KURL(KURL(), scriptState->executionContext()->securityOrigin()->toString()), new PermissionsCallback(resolver, permissions.release()));
     return promise;
 }