cc: Remove SetNeedsUpdate function from cc::Layer

cc/test/layer_internals_for_test.cc

-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "cc/test/layer_internals_for_test.h"
-
-#include "cc/layers/layer.h"
-
-namespace cc {
-
-LayerInternalsForTest::LayerInternalsForTest(Layer* layer) : layer_(layer) {}
-
-void LayerInternalsForTest::OnOpacityAnimated(float opacity) {
-  layer_->OnOpacityAnimated(opacity);
-}
-
-void LayerInternalsForTest::OnTransformAnimated(
-    const gfx::Transform& transform) {
-  layer_->OnTransformAnimated(transform);
-}
-
-void LayerInternalsForTest::OnScrollOffsetAnimated(
-    const gfx::ScrollOffset& scroll_offset) {
-  layer_->OnScrollOffsetAnimated(scroll_offset);
-}
-
-}  // namespace cc