--- a/layout/generic/nsLineLayout.cpp
+++ b/layout/generic/nsLineLayout.cpp
@@ -3016,16 +3016,35 @@ nsLineLayout::TextAlignLine(nsLineBox* a
 }
 
 void
 nsLineLayout::RelativePositionFrames(nsOverflowAreas& aOverflowAreas)
 {
   RelativePositionFrames(mRootSpan, aOverflowAreas);
 }
 
+// This method applies any relative positioning to the given frame.
+void
+nsLineLayout::ApplyRelativePositioning(PerFrameData* aPFD)
+{
+  if (!aPFD->mRelativePos) {
+    return;
+  }
+
+  nsIFrame* frame = aPFD->mFrame;
+  WritingMode frameWM = frame->GetWritingMode();
+  LogicalPoint origin = frame->GetLogicalPosition(mContainerWidth);
+  // right and bottom are handled by
+  // nsHTMLReflowState::ComputeRelativeOffsets
+  nsHTMLReflowState::ApplyRelativePositioning(frame, frameWM,
+                                              aPFD->mOffsets, &origin,
+                                              mContainerWidth);
+  frame->SetPosition(frameWM, origin, mContainerWidth);
+}
+
 void
 nsLineLayout::RelativePositionFrames(PerSpanData* psd, nsOverflowAreas& aOverflowAreas)
 {
   nsOverflowAreas overflowAreas;
   WritingMode wm = psd->mWritingMode;
   if (psd != mRootSpan) {
     // The span's overflow areas come in three parts:
     // -- this frame's width and height
@@ -3054,26 +3073,17 @@ nsLineLayout::RelativePositionFrames(Per
     overflowAreas.VisualOverflow() = rect.GetPhysicalRect(wm, mContainerWidth);
     overflowAreas.ScrollableOverflow() = overflowAreas.VisualOverflow();
   }
 
   for (PerFrameData* pfd = psd->mFirstFrame; pfd; pfd = pfd->mNext) {
     nsIFrame* frame = pfd->mFrame;
 
     // Adjust the origin of the frame
-    if (pfd->mRelativePos) {
-      WritingMode frameWM = frame->GetWritingMode();
-      LogicalPoint origin = frame->GetLogicalPosition(mContainerWidth);
-      // right and bottom are handled by
-      // nsHTMLReflowState::ComputeRelativeOffsets
-      nsHTMLReflowState::ApplyRelativePositioning(frame, frameWM,
-                                                  pfd->mOffsets, &origin,
-                                                  mContainerWidth);
-      frame->SetPosition(frameWM, origin, mContainerWidth);
-    }
+    ApplyRelativePositioning(pfd);
 
     // We must position the view correctly before positioning its
     // descendants so that widgets are positioned properly (since only
     // some views have widgets).
     if (frame->HasView())
       nsContainerFrame::SyncFrameViewAfterReflow(mPresContext, frame,
         frame->GetView(), pfd->mOverflowAreas.VisualOverflow(),
         NS_FRAME_NO_SIZE_VIEW);

--- a/layout/generic/nsLineLayout.h
+++ b/layout/generic/nsLineLayout.h
@@ -660,16 +660,18 @@ protected:
                   nsHTMLReflowMetrics& aMetrics);
 
   void VerticalAlignFrames(PerSpanData* psd);
 
   void PlaceTopBottomFrames(PerSpanData* psd,
                             nscoord aDistanceFromStart,
                             nscoord aLineBSize);
 
+  void ApplyRelativePositioning(PerFrameData* aPFD);
+
   void RelativePositionFrames(PerSpanData* psd, nsOverflowAreas& aOverflowAreas);
 
   bool TrimTrailingWhiteSpaceIn(PerSpanData* psd, nscoord* aDeltaISize);
 
   struct JustificationComputationState;
   int32_t ComputeFrameJustification(PerSpanData* psd,
                                     JustificationComputationState& aState);