diff --git a/gfx/layers/ipc/CompositorParent.cpp b/gfx/layers/ipc/CompositorParent.cpp
index ae5482594728..592d553c8f62 100644
--- a/gfx/layers/ipc/CompositorParent.cpp
+++ b/gfx/layers/ipc/CompositorParent.cpp
@@ -738,11 +738,11 @@ SetShadowProperties(Layer* aLayer)
 }
 
 void
-CompositorParent::ScheduleRotationOnCompositorThread(const TargetConfig& aTargetConfig,
-                                                     bool aIsFirstPaint)
+CompositorParent::ShadowLayersUpdated(LayerTransactionParent* aLayerTree,
+                                      const TargetConfig& aTargetConfig,
+                                      bool aIsFirstPaint,
+                                      bool aScheduleComposite)
 {
-  MOZ_ASSERT(IsInCompositorThread());
-
   if (!aIsFirstPaint &&
       !mCompositionManager->IsFirstPaint() &&
       mCompositionManager->RequiresReorientation(aTargetConfig.orientation())) {
@@ -752,15 +752,6 @@ CompositorParent::ScheduleRotationOnCompositorThread(const TargetConfig& aTarget
     mForceCompositionTask = NewRunnableMethod(this, &CompositorParent::ForceComposition);
     ScheduleTask(mForceCompositionTask, gfxPrefs::OrientationSyncMillis());
   }
-}
-
-void
-CompositorParent::ShadowLayersUpdated(LayerTransactionParent* aLayerTree,
-                                      const TargetConfig& aTargetConfig,
-                                      bool aIsFirstPaint,
-                                      bool aScheduleComposite)
-{
-  ScheduleRotationOnCompositorThread(aTargetConfig, aIsFirstPaint);
 
   // Instruct the LayerManager to update its render bounds now. Since all the orientation
   // change, dimension change would be done at the stage, update the size here is free of
@@ -1259,12 +1250,7 @@ CrossProcessCompositorParent::ShadowLayersUpdated(
   bool aScheduleComposite)
 {
   uint64_t id = aLayerTree->GetId();
-
   MOZ_ASSERT(id != 0);
-  MOZ_ASSERT(sIndirectLayerTrees[id].mParent);
-
-  sIndirectLayerTrees[id].mParent->ScheduleRotationOnCompositorThread(aTargetConfig, aIsFirstPaint);
-
   Layer* shadowRoot = aLayerTree->GetRoot();
   if (shadowRoot) {
     SetShadowProperties(shadowRoot);
diff --git a/gfx/layers/ipc/CompositorParent.h b/gfx/layers/ipc/CompositorParent.h
index 3af7111e178b..b0cc866524b7 100644
--- a/gfx/layers/ipc/CompositorParent.h
+++ b/gfx/layers/ipc/CompositorParent.h
@@ -129,12 +129,6 @@ public:
   virtual void ScheduleComposition();
   void NotifyShadowTreeTransaction(uint64_t aId, bool aIsFirstPaint, bool aScheduleComposite);
 
-  /**
-   * Check rotation info and schedule a rendering task if needed.
-   * Only can be called from compositor thread.
-   */
-  void ScheduleRotationOnCompositorThread(const TargetConfig& aTargetConfig, bool aIsFirstPaint);
-
   /**
    * Returns the unique layer tree identifier that corresponds to the root
    * tree of this compositor.