--- a/layout/painting/nsDisplayList.cpp
+++ b/layout/painting/nsDisplayList.cpp
@@ -6176,53 +6176,55 @@ nsDisplayTransform::GetDeltaToTransformO
   if (aBoundsOverride &&
       !(aFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT)) {
     refBox.Init(aBoundsOverride->Size());
   } else {
     refBox.Init(aFrame);
   }
 
   /* Allows us to access dimension getters by index. */
-  float coords[2];
+  float transformOrigin[2];
   TransformReferenceBox::DimensionGetter dimensionGetter[] =
     { &TransformReferenceBox::Width, &TransformReferenceBox::Height };
   TransformReferenceBox::DimensionGetter offsetGetter[] =
     { &TransformReferenceBox::X, &TransformReferenceBox::Y };
 
   for (uint8_t index = 0; index < 2; ++index) {
     /* If the transform-origin specifies a percentage, take the percentage
      * of the size of the box.
      */
-    const nsStyleCoord &coord = display->mTransformOrigin[index];
-    if (coord.GetUnit() == eStyleUnit_Calc) {
-      const nsStyleCoord::Calc *calc = coord.GetCalcValue();
-      coords[index] =
+    const nsStyleCoord& originValue  = display->mTransformOrigin[index];
+    if (originValue.GetUnit() == eStyleUnit_Calc) {
+      const nsStyleCoord::Calc *calc = originValue.GetCalcValue();
+      transformOrigin[index] =
         NSAppUnitsToFloatPixels((refBox.*dimensionGetter[index])(), aAppUnitsPerPixel) *
           calc->mPercent +
         NSAppUnitsToFloatPixels(calc->mLength, aAppUnitsPerPixel);
-    } else if (coord.GetUnit() == eStyleUnit_Percent) {
-      coords[index] =
+    } else if (originValue.GetUnit() == eStyleUnit_Percent) {
+      transformOrigin[index] =
         NSAppUnitsToFloatPixels((refBox.*dimensionGetter[index])(), aAppUnitsPerPixel) *
-        coord.GetPercentValue();
+        originValue.GetPercentValue();
     } else {
-      MOZ_ASSERT(coord.GetUnit() == eStyleUnit_Coord, "unexpected unit");
-      coords[index] =
-        NSAppUnitsToFloatPixels(coord.GetCoordValue(), aAppUnitsPerPixel);
+      MOZ_ASSERT(originValue.GetUnit() == eStyleUnit_Coord,
+                 "unexpected unit");
+      transformOrigin[index] =
+        NSAppUnitsToFloatPixels(originValue.GetCoordValue(),
+                                aAppUnitsPerPixel);
     }
 
     if (aFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT) {
       // SVG frames (unlike other frames) have a reference box that can be (and
       // typically is) offset from the TopLeft() of the frame. We need to
       // account for that here.
-      coords[index] +=
+      transformOrigin[index] +=
         NSAppUnitsToFloatPixels((refBox.*offsetGetter[index])(), aAppUnitsPerPixel);
     }
   }
 
-  return Point3D(coords[0], coords[1],
+  return Point3D(transformOrigin[0], transformOrigin[1],
                  NSAppUnitsToFloatPixels(display->mTransformOrigin[2].GetCoordValue(),
                                          aAppUnitsPerPixel));
 }
 
 /* static */ bool
 nsDisplayTransform::ComputePerspectiveMatrix(const nsIFrame* aFrame,
                                              float aAppUnitsPerPixel,
                                              Matrix4x4& aOutMatrix)