diff --git a/layout/generic/nsLineLayout.cpp b/layout/generic/nsLineLayout.cpp
index 3e222ca16d5..a6f8b3503a4 100644
--- a/layout/generic/nsLineLayout.cpp
+++ b/layout/generic/nsLineLayout.cpp
@@ -3021,6 +3021,25 @@ 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)
 {
@@ -3059,16 +3078,7 @@ nsLineLayout::RelativePositionFrames(PerSpanData* psd, nsOverflowAreas& aOverflo
     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
diff --git a/layout/generic/nsLineLayout.h b/layout/generic/nsLineLayout.h
index 5eb9fff79a6..32000148b55 100644
--- a/layout/generic/nsLineLayout.h
+++ b/layout/generic/nsLineLayout.h
@@ -665,6 +665,8 @@ protected:
                             nscoord aDistanceFromStart,
                             nscoord aLineBSize);
 
+  void ApplyRelativePositioning(PerFrameData* aPFD);
+
   void RelativePositionFrames(PerSpanData* psd, nsOverflowAreas& aOverflowAreas);
 
   bool TrimTrailingWhiteSpaceIn(PerSpanData* psd, nscoord* aDeltaISize);