--- a/gfx/ipc/GPUProcessManager.cpp
+++ b/gfx/ipc/GPUProcessManager.cpp
@@ -835,17 +835,17 @@ void GPUProcessManager::DestroyProcess()
     mVsyncBridge = nullptr;
   }
 
   CrashReporter::AnnotateCrashReport(
       CrashReporter::Annotation::GPUProcessStatus, "Destroyed"_ns);
 }
 
 already_AddRefed<CompositorSession> GPUProcessManager::CreateTopLevelCompositor(
-    nsBaseWidget* aWidget, LayerManager* aLayerManager,
+    nsBaseWidget* aWidget, WebRenderLayerManager* aLayerManager,
     CSSToLayoutDeviceScale aScale, const CompositorOptions& aOptions,
     bool aUseExternalSurfaceSize, const gfx::IntSize& aSurfaceSize,
     bool* aRetryOut) {
   MOZ_ASSERT(aRetryOut);
 
   LayersId layerTreeId = AllocateLayerTreeId();
 
   EnsureProtocolsReady();
@@ -877,17 +877,17 @@ already_AddRefed<CompositorSession> GPUP
   }
 #endif  // defined(MOZ_WIDGET_ANDROID)
 
   *aRetryOut = false;
   return session.forget();
 }
 
 RefPtr<CompositorSession> GPUProcessManager::CreateRemoteSession(
-    nsBaseWidget* aWidget, LayerManager* aLayerManager,
+    nsBaseWidget* aWidget, WebRenderLayerManager* aLayerManager,
     const LayersId& aRootLayerTreeId, CSSToLayoutDeviceScale aScale,
     const CompositorOptions& aOptions, bool aUseExternalSurfaceSize,
     const gfx::IntSize& aSurfaceSize) {
 #ifdef MOZ_WIDGET_SUPPORTS_OOP_COMPOSITING
   widget::CompositorWidgetInitData initData;
   aWidget->GetCompositorWidgetInitData(&initData);
 
   RefPtr<CompositorBridgeChild> child =