diff -r 000000000000 -r 6474c204b198 layout/base/nsDisplayListInvalidation.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/base/nsDisplayListInvalidation.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,97 @@
+/*-*- Mode: C++; tab-width: 2; 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 "nsDisplayListInvalidation.h"
+#include "nsDisplayList.h"
+#include "nsIFrame.h"
+
+nsDisplayItemGeometry::nsDisplayItemGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder)
+{
+  MOZ_COUNT_CTOR(nsDisplayItemGeometry);
+  bool snap;
+  mBounds = aItem->GetBounds(aBuilder, &snap);
+}
+
+nsDisplayItemGeometry::~nsDisplayItemGeometry()
+{
+  MOZ_COUNT_DTOR(nsDisplayItemGeometry);
+}
+
+nsDisplayItemGenericGeometry::nsDisplayItemGenericGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder)
+  : nsDisplayItemGeometry(aItem, aBuilder)
+  , mBorderRect(aItem->GetBorderRect())
+{}
+
+void
+nsDisplayItemGenericGeometry::MoveBy(const nsPoint& aOffset)
+{
+  mBounds.MoveBy(aOffset);
+  mBorderRect.MoveBy(aOffset);
+}
+
+nsDisplayItemBoundsGeometry::nsDisplayItemBoundsGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder)
+  : nsDisplayItemGeometry(aItem, aBuilder)
+{
+  nscoord radii[8];
+  mHasRoundedCorners = aItem->Frame()->GetBorderRadii(radii);
+}
+
+void
+nsDisplayItemBoundsGeometry::MoveBy(const nsPoint& aOffset)
+{
+  mBounds.MoveBy(aOffset);
+}
+
+nsDisplayBorderGeometry::nsDisplayBorderGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder)
+  : nsDisplayItemGeometry(aItem, aBuilder)
+  , mContentRect(aItem->GetContentRect())
+{}
+
+void
+nsDisplayBorderGeometry::MoveBy(const nsPoint& aOffset)
+{
+  mBounds.MoveBy(aOffset);
+  mContentRect.MoveBy(aOffset);
+}
+
+nsDisplayBackgroundGeometry::nsDisplayBackgroundGeometry(nsDisplayBackgroundImage* aItem,
+                                                         nsDisplayListBuilder* aBuilder)
+  : nsDisplayItemGeometry(aItem, aBuilder)
+  , mPositioningArea(aItem->GetPositioningArea())
+{}
+
+void
+nsDisplayBackgroundGeometry::MoveBy(const nsPoint& aOffset)
+{
+  mBounds.MoveBy(aOffset);
+  mPositioningArea.MoveBy(aOffset);
+}
+
+nsDisplayThemedBackgroundGeometry::nsDisplayThemedBackgroundGeometry(nsDisplayThemedBackground* aItem,
+                                                                     nsDisplayListBuilder* aBuilder)
+  : nsDisplayItemGeometry(aItem, aBuilder)
+  , mPositioningArea(aItem->GetPositioningArea())
+  , mWindowIsActive(aItem->IsWindowActive())
+{}
+
+void
+nsDisplayThemedBackgroundGeometry::MoveBy(const nsPoint& aOffset)
+{
+  mBounds.MoveBy(aOffset);
+  mPositioningArea.MoveBy(aOffset);
+}
+
+nsDisplayBoxShadowInnerGeometry::nsDisplayBoxShadowInnerGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder)
+  : nsDisplayItemGeometry(aItem, aBuilder)
+  , mPaddingRect(aItem->GetPaddingRect())
+{}
+
+void
+nsDisplayBoxShadowInnerGeometry::MoveBy(const nsPoint& aOffset)
+{
+  mBounds.MoveBy(aOffset);
+  mPaddingRect.MoveBy(aOffset);
+}
+