1 files changed, 23 insertions, 0 deletions
diff --git a/gfx/layers/FrameMetrics.cpp b/gfx/layers/FrameMetrics.cpp
new file mode 100644
index 000000000..7b5108557
--- /dev/null
+++ b/gfx/layers/FrameMetrics.cpp
@@ -0,0 +1,23 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "FrameMetrics.h"
+#include "gfxPrefs.h"
+
+namespace mozilla {
+namespace layers {
+
+const FrameMetrics::ViewID FrameMetrics::NULL_SCROLL_ID = 0;
+
+void
+ScrollMetadata::SetUsesContainerScrolling(bool aValue) {
+  MOZ_ASSERT_IF(aValue, gfxPrefs::LayoutUseContainersForRootFrames());
+  mUsesContainerScrolling = aValue;
+}
+
+StaticAutoPtr<const ScrollMetadata> ScrollMetadata::sNullMetadata;
+
+}
+}