--- a/gfx/layers/apz/src/APZCTreeManager.cpp
+++ b/gfx/layers/apz/src/APZCTreeManager.cpp
@@ -1803,17 +1803,17 @@ APZCTreeManager::BuildOverscrollHandoffC
 void
 APZCTreeManager::SetLongTapEnabled(bool aLongTapEnabled)
 {
   APZThreadUtils::RunOnControllerThread(
     NewRunnableFunction(GestureEventListener::SetLongTapEnabled, aLongTapEnabled));
 }
 
 RefPtr<HitTestingTreeNode>
-APZCTreeManager::FindScrollNode(const AsyncDragMetrics& aDragMetrics)
+APZCTreeManager::FindScrollThumbNode(const AsyncDragMetrics& aDragMetrics)
 {
   MutexAutoLock lock(mTreeLock);
 
   return DepthFirstSearch<ReverseIterator>(mRootNode.get(),
       [&aDragMetrics](HitTestingTreeNode* aNode) {
         return aNode->MatchesScrollDragMetrics(aDragMetrics);
       });
 }

--- a/gfx/layers/apz/src/APZCTreeManager.h
+++ b/gfx/layers/apz/src/APZCTreeManager.h
@@ -290,17 +290,17 @@ public:
    * Returns the current dpi value in use.
    */
   static float GetDPI() { return sDPI; }
 
   /**
    * Find the hit testing node for the scrollbar thumb that matches these
    * drag metrics.
    */
-  RefPtr<HitTestingTreeNode> FindScrollNode(const AsyncDragMetrics& aDragMetrics);
+  RefPtr<HitTestingTreeNode> FindScrollThumbNode(const AsyncDragMetrics& aDragMetrics);
 
   /**
    * Sets allowed touch behavior values for current touch-session for specific
    * input block (determined by aInputBlock).
    * Should be invoked by the widget. Each value of the aValues arrays
    * corresponds to the different touch point that is currently active.
    * Must be called after receiving the TOUCH_START event that starts the
    * touch-session.

--- a/gfx/layers/apz/src/AsyncPanZoomController.cpp
+++ b/gfx/layers/apz/src/AsyncPanZoomController.cpp
@@ -901,17 +901,17 @@ nsEventStatus AsyncPanZoomController::Ha
     ScrollSnap();
   }
 
   if (aEvent.mType != MouseInput::MouseType::MOUSE_MOVE) {
     return nsEventStatus_eConsumeNoDefault;
   }
 
   RefPtr<HitTestingTreeNode> node =
-    GetApzcTreeManager()->FindScrollNode(aDragMetrics);
+    GetApzcTreeManager()->FindScrollThumbNode(aDragMetrics);
   if (!node) {
     return nsEventStatus_eConsumeNoDefault;
   }
 
   const ScrollThumbData& thumbData = node->GetScrollThumbData();
 
   mozilla::Telemetry::Accumulate(mozilla::Telemetry::SCROLL_INPUT_METHODS,
       (uint32_t) ScrollInputMethod::ApzScrollbarDrag);