Clean up Mac swap acknowledgement code

ui/views/cocoa/bridged_native_widget.mm

Index: ui/views/cocoa/bridged_native_widget.mm
diff --git a/ui/views/cocoa/bridged_native_widget.mm b/ui/views/cocoa/bridged_native_widget.mm
index 37c5050e2d431d1cf0288f3bfbdb50bcb510512a..b91f5b4b2d330a305cbb8ef482eebbe8efa5134e 100644
--- a/ui/views/cocoa/bridged_native_widget.mm
+++ b/ui/views/cocoa/bridged_native_widget.mm
@@ -888,10 +888,6 @@ NSView* BridgedNativeWidget::AcceleratedWidgetGetNSView() const {
   return compositor_superview_;
 }
 
-bool BridgedNativeWidget::AcceleratedWidgetShouldIgnoreBackpressure() const {
-  return true;
-}
-
 void BridgedNativeWidget::AcceleratedWidgetGetVSyncParameters(
   base::TimeTicks* timebase, base::TimeDelta* interval) const {
   // TODO(tapted): Add vsync support.
@@ -899,8 +895,7 @@ void BridgedNativeWidget::AcceleratedWidgetGetVSyncParameters(
   *interval = base::TimeDelta();
 }
 
-void BridgedNativeWidget::AcceleratedWidgetSwapCompleted(
-    const std::vector<ui::LatencyInfo>& latency_info) {
+void BridgedNativeWidget::AcceleratedWidgetSwapCompleted() {
   // Ignore frames arriving "late" for an old size. A frame at the new size
   // should arrive soon.
   if (!compositor_widget_->HasFrameOfSize(GetClientAreaSize()))
@@ -912,10 +907,6 @@ void BridgedNativeWidget::AcceleratedWidgetSwapCompleted(
   }
 }
 
-void BridgedNativeWidget::AcceleratedWidgetHitError() {
-  compositor_->ScheduleFullRedraw();
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // BridgedNativeWidget, BridgedNativeWidgetOwner: