diff -r 000000000000 -r 6474c204b198 layout/forms/nsLegendFrame.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/forms/nsLegendFrame.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,90 @@
+/* -*- 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 "nsLegendFrame.h"
+#include "nsIContent.h"
+#include "nsGenericHTMLElement.h"
+#include "nsAttrValueInlines.h"
+#include "nsHTMLParts.h"
+#include "nsGkAtoms.h"
+#include "nsStyleConsts.h"
+#include "nsFormControlFrame.h"
+
+nsIFrame*
+NS_NewLegendFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
+{
+#ifdef DEBUG
+  const nsStyleDisplay* disp = aContext->StyleDisplay();
+  NS_ASSERTION(!disp->IsAbsolutelyPositionedStyle() && !disp->IsFloatingStyle(),
+               "Legends should not be positioned and should not float");
+#endif
+
+  nsIFrame* f = new (aPresShell) nsLegendFrame(aContext);
+  if (f) {
+    f->AddStateBits(NS_BLOCK_FLOAT_MGR | NS_BLOCK_MARGIN_ROOT);
+  }
+  return f;
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsLegendFrame)
+
+nsIAtom*
+nsLegendFrame::GetType() const
+{
+  return nsGkAtoms::legendFrame; 
+}
+
+void
+nsLegendFrame::DestroyFrom(nsIFrame* aDestructRoot)
+{
+  nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
+  nsBlockFrame::DestroyFrom(aDestructRoot);
+}
+
+NS_QUERYFRAME_HEAD(nsLegendFrame)
+  NS_QUERYFRAME_ENTRY(nsLegendFrame)
+NS_QUERYFRAME_TAIL_INHERITING(nsBlockFrame)
+
+nsresult 
+nsLegendFrame::Reflow(nsPresContext*          aPresContext,
+                     nsHTMLReflowMetrics&     aDesiredSize,
+                     const nsHTMLReflowState& aReflowState,
+                     nsReflowStatus&          aStatus)
+{
+  DO_GLOBAL_REFLOW_COUNT("nsLegendFrame");
+  DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
+  if (mState & NS_FRAME_FIRST_REFLOW) {
+    nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), true);
+  }
+  return nsBlockFrame::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus);
+}
+
+// REVIEW: We don't need to override BuildDisplayList, nsBlockFrame will honour
+// our visibility setting
+int32_t nsLegendFrame::GetAlign()
+{
+  int32_t intValue = NS_STYLE_TEXT_ALIGN_LEFT;
+  if (mParent && NS_STYLE_DIRECTION_RTL == mParent->StyleVisibility()->mDirection) {
+    intValue = NS_STYLE_TEXT_ALIGN_RIGHT;
+  }
+
+  nsGenericHTMLElement *content = nsGenericHTMLElement::FromContent(mContent);
+
+  if (content) {
+    const nsAttrValue* attr = content->GetParsedAttr(nsGkAtoms::align);
+    if (attr && attr->Type() == nsAttrValue::eEnum) {
+      intValue = attr->GetEnumValue();
+    }
+  }
+  return intValue;
+}
+
+#ifdef DEBUG_FRAME_DUMP
+nsresult
+nsLegendFrame::GetFrameName(nsAString& aResult) const
+{
+  return MakeFrameName(NS_LITERAL_STRING("Legend"), aResult);
+}
+#endif