Remove QuadCuller class and make QuadSink concrete

cc/trees/quad_culler.cc

-// Copyright 2012 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/trees/quad_culler.h"
-
-#include "cc/debug/debug_colors.h"
-#include "cc/layers/append_quads_data.h"
-#include "cc/layers/layer_impl.h"
-#include "cc/quads/debug_border_draw_quad.h"
-#include "cc/quads/render_pass.h"
-#include "cc/quads/render_pass_draw_quad.h"
-#include "cc/trees/occlusion_tracker.h"
-#include "third_party/skia/include/core/SkColor.h"
-#include "ui/gfx/transform.h"
-
-namespace cc {
-
-QuadCuller::QuadCuller(RenderPass* render_pass,
-                       const LayerImpl* layer,
-                       const OcclusionTracker<LayerImpl>& occlusion_tracker)
-    : render_pass_(render_pass),
-      layer_(layer),
-      occlusion_tracker_(occlusion_tracker),
-      current_shared_quad_state_(NULL) {
-}
-
-SharedQuadState* QuadCuller::CreateSharedQuadState() {
-  current_shared_quad_state_ = render_pass_->CreateAndAppendSharedQuadState();
-  return current_shared_quad_state_;
-}
-
-gfx::Rect QuadCuller::UnoccludedContentRect(
-    const gfx::Rect& content_rect,
-    const gfx::Transform& draw_transform) {
-  return occlusion_tracker_.UnoccludedContentRect(content_rect, draw_transform);
-}
-
-gfx::Rect QuadCuller::UnoccludedContributingSurfaceContentRect(
-    const gfx::Rect& content_rect,
-    const gfx::Transform& draw_transform) {
-  return occlusion_tracker_.UnoccludedContributingSurfaceContentRect(
-      content_rect, draw_transform);
-}
-
-void QuadCuller::Append(scoped_ptr<DrawQuad> draw_quad) {
-  DCHECK(draw_quad->shared_quad_state == current_shared_quad_state_);
-  DCHECK(!render_pass_->shared_quad_state_list.empty());
-  DCHECK(render_pass_->shared_quad_state_list.back() ==
-         current_shared_quad_state_);
-  DCHECK(!draw_quad->rect.IsEmpty());
-  DCHECK(!draw_quad->visible_rect.IsEmpty());
-  render_pass_->quad_list.push_back(draw_quad.Pass());
-}
-
-}  // namespace cc