Bug 1298008 Part 1: Update GeometryUtils::GetBoxRectForFrame to use GetMarginRectRelativeToSelf for margin boxes. r=dholbert

MozReview-Commit-ID: HpOi0TnqEgw

--HG--
extra : rebase_source : a9bc4d4ab09961b0babdf862311a1d504d40bfc6

layout/base/GeometryUtils.cpp

@@ -152,11 +152,7 @@ GetBoxRectForFrame(nsIFrame** aFrame, CSSBoxType aType)
   case CSSBoxType::Content: r = f->GetContentRectRelativeToSelf(); break;
   case CSSBoxType::Padding: r = f->GetPaddingRectRelativeToSelf(); break;
   case CSSBoxType::Border: r = nsRect(nsPoint(0, 0), f->GetSize()); break;
-  case CSSBoxType::Margin: {
-    r = nsRect(nsPoint(0, 0), f->GetSize());
-    r.Inflate(f->GetUsedMargin());
-    break;
-  }
+  case CSSBoxType::Margin: r = f->GetMarginRectRelativeToSelf(); break;
   default: MOZ_ASSERT(false, "unknown box type"); return r;
   }