cc: Chromify Layer and LayerImpl classes.

cc/layer.cc

 // Copyright 2010 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/layer.h"
 
 #include "cc/animation.h"
 #include "cc/animation_events.h"
 #include "cc/layer_animation_controller.h"
 #include "cc/layer_impl.h"
 #include "cc/layer_tree_host.h"
 #include "cc/layer_tree_impl.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebAnimationDelegate.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebLayerScrollClient.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebSize.h"
 #include "third_party/skia/include/core/SkImageFilter.h"
 #include "ui/gfx/rect_conversions.h"
 
 namespace cc {
 
-static int s_nextLayerId = 1;
-
-scoped_refptr<Layer> Layer::create()
-{
-    return make_scoped_refptr(new Layer());
+static int s_next_layer_id = 1;
+
+scoped_refptr<Layer> Layer::Create() {
+  return make_scoped_refptr(new Layer());
 }
 
 Layer::Layer()
-    : m_needsDisplay(false)
-    , m_stackingOrderChanged(false)
-    , m_layerId(s_nextLayerId++)
-    , m_ignoreSetNeedsCommit(false)
-    , m_parent(0)
-    , m_layerTreeHost(0)
-    , m_scrollable(false)
-    , m_shouldScrollOnMainThread(false)
-    , m_haveWheelEventHandlers(false)
-    , m_anchorPoint(0.5, 0.5)
-    , m_backgroundColor(0)
-    , m_opacity(1.0)
-    , m_anchorPointZ(0)
-    , m_isContainerForFixedPositionLayers(false)
-    , m_fixedToContainerLayer(false)
-    , m_isDrawable(false)
-    , m_masksToBounds(false)
-    , m_contentsOpaque(false)
-    , m_doubleSided(true)
-    , m_preserves3D(false)
-    , m_useParentBackfaceVisibility(false)
-    , m_drawCheckerboardForMissingTiles(false)
-    , m_forceRenderSurface(false)
-    , m_replicaLayer(0)
-    , m_rasterScale(1.0)
-    , m_automaticallyComputeRasterScale(false)
-    , m_boundsContainPageScale(false)
-    , m_layerAnimationDelegate(0)
-    , m_layerScrollClient(0)
-{
-    if (m_layerId < 0) {
-        s_nextLayerId = 1;
-        m_layerId = s_nextLayerId++;
+    : needs_display_(false),
+      stacking_order_changed_(false),
+      layer_id_(s_next_layer_id++),
+      ignore_set_needs_commit_(false),
+      parent_(NULL),
+      layer_tree_host_(NULL),
+      scrollable_(false),
+      should_scroll_on_main_thread_(false),
+      have_wheel_event_handlers_(false),
+      anchor_point_(0.5f, 0.5f),
+      background_color_(0),
+      opacity_(1.f),
+      anchor_point_z_(0.f),
+      is_container_for_fixed_position_layers_(false),
+      fixed_to_container_layer_(false),
+      is_drawable_(false),
+      masks_to_bounds_(false),
+      contents_opaque_(false),
+      double_sided_(true),
+      preserves_3d_(false),
+      use_parent_backface_visibility_(false),
+      draw_checkerboard_for_missing_tiles_(false),
+      force_render_surface_(false),
+      replica_layer_(NULL),
+      raster_scale_(1.f),
+      automatically_compute_raster_scale_(false),
+      bounds_contain_page_scale_(false),
+      layer_animation_delegate_(NULL),
+      layer_scroll_client_(NULL) {
+  if (layer_id_ < 0) {
+    s_next_layer_id = 1;
+    layer_id_ = s_next_layer_id++;
+  }
+
+  layer_animation_controller_ = LayerAnimationController::Create(layer_id_);
+  layer_animation_controller_->AddObserver(this);
+  AddLayerAnimationEventObserver(layer_animation_controller_.get());
+}
+
+Layer::~Layer() {
+  // Our parent should be holding a reference to us so there should be no
+  // way for us to be destroyed while we still have a parent.
+  DCHECK(!parent());
+
+  layer_animation_controller_->RemoveObserver(this);
+
+  // Remove the parent reference from all children and dependents.
+  RemoveAllChildren();
+  if (mask_layer_) {
+    DCHECK_EQ(this, mask_layer_->parent());
+    mask_layer_->RemoveFromParent();
+  }
+  if (replica_layer_) {
+    DCHECK_EQ(this, replica_layer_->parent());
+    replica_layer_->RemoveFromParent();
+  }
+}
+
+void Layer::SetLayerTreeHost(LayerTreeHost* host) {
+  if (layer_tree_host_ == host)
+    return;
+
+  layer_tree_host_ = host;
+
+  for (size_t i = 0; i < children_.size(); ++i)
+    children_[i]->SetLayerTreeHost(host);
+
+  if (mask_layer_)
+    mask_layer_->SetLayerTreeHost(host);
+  if (replica_layer_)
+    replica_layer_->SetLayerTreeHost(host);
+
+  layer_animation_controller_->SetAnimationRegistrar(
+      host ? host->animationRegistrar() : NULL);
+
+  if (host && layer_animation_controller_->has_any_animation())
+    host->setNeedsCommit();
+  if (host &&
+      (!filters_.isEmpty() || !background_filters_.isEmpty() || filter_))
+    layer_tree_host_->setNeedsFilterContext();
+
+}
+
+void Layer::SetNeedsCommit() {
+  if (ignore_set_needs_commit_)
+    return;
+  if (layer_tree_host_)
+    layer_tree_host_->setNeedsCommit();
+}
+
+void Layer::SetNeedsFullTreeSync() {
+  if (layer_tree_host_)
+    layer_tree_host_->setNeedsFullTreeSync();
+}
+
+gfx::Rect Layer::LayerRectToContentRect(const gfx::RectF& layer_rect) const {
+  gfx::RectF content_rect =
+      gfx::ScaleRect(layer_rect, contents_scale_x(), contents_scale_y());
+  // Intersect with content rect to avoid the extra pixel because for some
+  // values x and y, ceil((x / y) * y) may be x + 1.
+  content_rect.Intersect(gfx::Rect(gfx::Point(), content_bounds()));
+  return gfx::ToEnclosingRect(content_rect);
+}
+
+bool Layer::BlocksPendingCommit() const {
+  return false;
+}
+
+bool Layer::CanClipSelf() const {
+  return false;
+}
+
+bool Layer::BlocksPendingCommitRecursive() const {
+  if (BlocksPendingCommit())
+    return true;
+  if (mask_layer() && mask_layer()->BlocksPendingCommitRecursive())
+    return true;
+  if (replica_layer() && replica_layer()->BlocksPendingCommitRecursive())
+    return true;
+  for (size_t i = 0; i < children_.size(); ++i) {
+    if (children_[i]->BlocksPendingCommitRecursive())
+      return true;
+  }
+  return false;
+}
+
+void Layer::SetParent(Layer* layer) {
+  DCHECK(!layer || !layer->HasAncestor(this));
+  parent_ = layer;
+  SetLayerTreeHost(parent_ ? parent_->layer_tree_host() : NULL);
+
+  ForceAutomaticRasterScaleToBeRecomputed();
+  if (mask_layer_)
+    mask_layer_->ForceAutomaticRasterScaleToBeRecomputed();
+  if (replica_layer_ && replica_layer_->mask_layer_)
+    replica_layer_->mask_layer_->ForceAutomaticRasterScaleToBeRecomputed();
+}
+
+bool Layer::HasAncestor(Layer* ancestor) const {
+  for (const Layer* layer = parent(); layer; layer = layer->parent()) {
+    if (layer == ancestor)
+      return true;
+  }
+  return false;
+}
+
+void Layer::AddChild(scoped_refptr<Layer> child) {
+  InsertChild(child, children_.size());
+}
+
+void Layer::InsertChild(scoped_refptr<Layer> child, size_t index) {
+  child->RemoveFromParent();
+  child->SetParent(this);
+  child->stacking_order_changed_ = true;
+
+  index = std::min(index, children_.size());
+  children_.insert(children_.begin() + index, child);
+  SetNeedsFullTreeSync();
+}
+
+void Layer::RemoveFromParent() {
+  if (parent_)
+    parent_->RemoveChildOrDependent(this);
+}
+
+void Layer::RemoveChildOrDependent(Layer* child) {
+  if (mask_layer_ == child) {
+    mask_layer_->SetParent(NULL);
+    mask_layer_ = NULL;
+    SetNeedsFullTreeSync();
+    return;
+  }
+  if (replica_layer_ == child) {
+    replica_layer_->SetParent(NULL);
+    replica_layer_ = NULL;
+    SetNeedsFullTreeSync();
+    return;
+  }
+
+  for (LayerList::iterator iter = children_.begin();
+       iter != children_.end();
+       ++iter) {
+    if (*iter != child)
+      continue;
+
+    child->SetParent(NULL);
+    children_.erase(iter);
+    SetNeedsFullTreeSync();
+    return;
+  }
+}
+
+void Layer::ReplaceChild(Layer* reference, scoped_refptr<Layer> new_layer) {
+  DCHECK(reference);
+  DCHECK_EQ(reference->parent(), this);
+
+  if (reference == new_layer)
+    return;
+
+  int reference_index = IndexOfChild(reference);
+  if (reference_index == -1) {
+    NOTREACHED();
+    return;
+  }
+
+  reference->RemoveFromParent();
+
+  if (new_layer) {
+    new_layer->RemoveFromParent();
+    InsertChild(new_layer, reference_index);
+  }
+}
+
+int Layer::IndexOfChild(const Layer* reference) {
+  for (size_t i = 0; i < children_.size(); ++i) {
+    if (children_[i] == reference)
+      return i;
+  }
+  return -1;
+}
+
+void Layer::SetBounds(gfx::Size size) {
+  if (bounds() == size)
+    return;
+
+  bool first_resize = bounds().IsEmpty() && !size.IsEmpty();
+
+  bounds_ = size;
+
+  if (first_resize)
+    SetNeedsDisplay();
+  else
+    SetNeedsCommit();
+}
+
+Layer* Layer::RootLayer() {
+  Layer* layer = this;
+  while (layer->parent())
+    layer = layer->parent();
+  return layer;
+}
+
+void Layer::RemoveAllChildren() {
+  while (children_.size()) {
+    Layer* layer = children_[0].get();
+    DCHECK_EQ(this, layer->parent());
+    layer->RemoveFromParent();
+  }
+}
+
+void Layer::SetChildren(const LayerList& children) {
+  if (children == children_)
+    return;
+
+  RemoveAllChildren();
+  for (size_t i = 0; i < children.size(); ++i)
+    AddChild(children[i]);
+}
+
+void Layer::SetAnchorPoint(gfx::PointF anchor_point) {
+  if (anchor_point_ == anchor_point)
+    return;
+  anchor_point_ = anchor_point;
+  SetNeedsCommit();
+}
+
+void Layer::SetAnchorPointZ(float anchor_point_z) {
+  if (anchor_point_z_ == anchor_point_z)
+    return;
+  anchor_point_z_ = anchor_point_z;
+  SetNeedsCommit();
+}
+
+void Layer::SetBackgroundColor(SkColor background_color) {
+  if (background_color_ == background_color)
+    return;
+  background_color_ = background_color;
+  SetNeedsCommit();
+}
+
+void Layer::CalculateContentsScale(
+    float ideal_contents_scale,
+    bool animating_transform_to_screen,
+    float* contents_scale_x,
+    float* contents_scale_y,
+    gfx::Size* contentBounds) {
+  *contents_scale_x = 1;
+  *contents_scale_y = 1;
+  *contentBounds = bounds();
+}
+
+void Layer::SetMasksToBounds(bool masks_to_bounds) {
+  if (masks_to_bounds_ == masks_to_bounds)
+    return;
+  masks_to_bounds_ = masks_to_bounds;
+  SetNeedsCommit();
+}
+
+void Layer::SetMaskLayer(Layer* mask_layer) {
+  if (mask_layer_ == mask_layer)
+    return;
+  if (mask_layer_) {
+    DCHECK_EQ(this, mask_layer_->parent());
+    mask_layer_->RemoveFromParent();
+  }
+  mask_layer_ = mask_layer;
+  if (mask_layer_) {
+    DCHECK(!mask_layer_->parent());
+    mask_layer_->RemoveFromParent();
+    mask_layer_->SetParent(this);
+    mask_layer_->SetIsMask(true);
+  }
+  SetNeedsFullTreeSync();
+}
+
+void Layer::SetReplicaLayer(Layer* layer) {
+  if (replica_layer_ == layer)
+    return;
+  if (replica_layer_) {
+    DCHECK_EQ(this, replica_layer_->parent());
+    replica_layer_->RemoveFromParent();
+  }
+  replica_layer_ = layer;
+  if (replica_layer_) {
+    DCHECK(!replica_layer_->parent());
+    replica_layer_->RemoveFromParent();
+    replica_layer_->SetParent(this);
+  }
+  SetNeedsFullTreeSync();
+}
+
+void Layer::SetFilters(const WebKit::WebFilterOperations& filters) {
+  if (filters_ == filters)
+    return;
+  DCHECK(!filter_);
+  filters_ = filters;
+  SetNeedsCommit();
+  if (!filters.isEmpty() && layer_tree_host_)
+    layer_tree_host_->setNeedsFilterContext();
+}
+
+void Layer::SetFilter(const skia::RefPtr<SkImageFilter>& filter) {
+  if (filter_.get() == filter.get())
+    return;
+  DCHECK(filters_.isEmpty());
+  filter_ = filter;
+  SetNeedsCommit();
+  if (filter && layer_tree_host_)
+    layer_tree_host_->setNeedsFilterContext();
+}
+
+void Layer::SetBackgroundFilters(const WebKit::WebFilterOperations& filters) {
+  if (background_filters_ == filters)
+    return;
+  background_filters_ = filters;
+  SetNeedsCommit();
+  if (!filters.isEmpty() && layer_tree_host_)
+    layer_tree_host_->setNeedsFilterContext();
+}
+
+void Layer::SetOpacity(float opacity) {
+  if (opacity_ == opacity)
+    return;
+  opacity_ = opacity;
+  SetNeedsCommit();
+}
+
+bool Layer::OpacityIsAnimating() const {
+  return layer_animation_controller_->IsAnimatingProperty(Animation::Opacity);
+}
+
+void Layer::SetContentsOpaque(bool opaque) {
+  if (contents_opaque_ == opaque)
+    return;
+  contents_opaque_ = opaque;
+  SetNeedsCommit();
+}
+
+void Layer::SetPosition(gfx::PointF position) {
+  if (position_ == position)
+    return;
+  position_ = position;
+  SetNeedsCommit();
+}
+
+void Layer::SetSublayerTransform(const gfx::Transform& sublayer_transform) {
+  if (sublayer_transform_ == sublayer_transform)
+    return;
+  sublayer_transform_ = sublayer_transform;
+  SetNeedsCommit();
+}
+
+void Layer::SetTransform(const gfx::Transform& transform) {
+  if (transform_ == transform)
+    return;
+  transform_ = transform;
+  SetNeedsCommit();
+}
+
+bool Layer::TransformIsAnimating() const {
+  return layer_animation_controller_->IsAnimatingProperty(Animation::Transform);
+}
+
+void Layer::SetScrollOffset(gfx::Vector2d scroll_offset) {
+  if (scroll_offset_ == scroll_offset)
+    return;
+  scroll_offset_ = scroll_offset;
+  if (layer_scroll_client_)
+    layer_scroll_client_->didScroll();
+  SetNeedsCommit();
+}
+
+void Layer::SetMaxScrollOffset(gfx::Vector2d max_scroll_offset) {
+  if (max_scroll_offset_ == max_scroll_offset)
+    return;
+  max_scroll_offset_ = max_scroll_offset;
+  SetNeedsCommit();
+}
+
+void Layer::SetScrollable(bool scrollable) {
+  if (scrollable_ == scrollable)
+    return;
+  scrollable_ = scrollable;
+  SetNeedsCommit();
+}
+
+void Layer::SetShouldScrollOnMainThread(bool should_scroll_on_main_thread) {
+  if (should_scroll_on_main_thread_ == should_scroll_on_main_thread)
+    return;
+  should_scroll_on_main_thread_ = should_scroll_on_main_thread;
+  SetNeedsCommit();
+}
+
+void Layer::SetHaveWheelEventHandlers(bool have_wheel_event_handlers) {
+  if (have_wheel_event_handlers_ == have_wheel_event_handlers)
+    return;
+  have_wheel_event_handlers_ = have_wheel_event_handlers;
+  SetNeedsCommit();
+}
+
+void Layer::SetNonFastScrollableRegion(const Region& region) {
+  if (non_fast_scrollable_region_ == region)
+    return;
+  non_fast_scrollable_region_ = region;
+  SetNeedsCommit();
+}
+
+void Layer::SetTouchEventHandlerRegion(const Region& region) {
+  if (touch_event_handler_region_ == region)
+    return;
+  touch_event_handler_region_ = region;
+}
+
+void Layer::SetDrawCheckerboardForMissingTiles(bool checkerboard) {
+  if (draw_checkerboard_for_missing_tiles_ == checkerboard)
+    return;
+  draw_checkerboard_for_missing_tiles_ = checkerboard;
+  SetNeedsCommit();
+}
+
+void Layer::SetForceRenderSurface(bool force) {
+  if (force_render_surface_ == force)
+    return;
+  force_render_surface_ = force;
+  SetNeedsCommit();
+}
+
+void Layer::SetImplTransform(const gfx::Transform& transform) {
+  if (impl_transform_ == transform)
+    return;
+  impl_transform_ = transform;
+  SetNeedsCommit();
+}
+
+void Layer::SetDoubleSided(bool double_sided) {
+  if (double_sided_ == double_sided)
+    return;
+  double_sided_ = double_sided;
+  SetNeedsCommit();
+}
+
+void Layer::SetIsDrawable(bool is_drawable) {
+  if (is_drawable_ == is_drawable)
+    return;
+
+  is_drawable_ = is_drawable;
+  SetNeedsCommit();
+}
+
+void Layer::SetNeedsDisplayRect(const gfx::RectF& dirty_rect) {
+  update_rect_.Union(dirty_rect);
+  needs_display_ = true;
+
+  // Simply mark the contents as dirty. For non-root layers, the call to
+  // setNeedsCommit will schedule a fresh compositing pass.
+  // For the root layer, setNeedsCommit has no effect.
+  if (DrawsContent() && !update_rect_.IsEmpty())
+    SetNeedsCommit();
+}
+
+bool Layer::DescendantIsFixedToContainerLayer() const {
+  for (size_t i = 0; i < children_.size(); ++i) {
+    if (children_[i]->fixed_to_container_layer() ||
+        children_[i]->DescendantIsFixedToContainerLayer())
+      return true;
+  }
+  return false;
+}
+
+void Layer::SetIsContainerForFixedPositionLayers(bool container) {
+  if (is_container_for_fixed_position_layers_ == container)
+    return;
+  is_container_for_fixed_position_layers_ = container;
+
+  if (layer_tree_host_ && layer_tree_host_->commitRequested())
+    return;
+
+  // Only request a commit if we have a fixed positioned descendant.
+  if (DescendantIsFixedToContainerLayer())
+    SetNeedsCommit();
+}
+
+void Layer::SetFixedToContainerLayer(bool fixed_to_container_layer) {
+  if (fixed_to_container_layer_ == fixed_to_container_layer)
+    return;
+  fixed_to_container_layer_ = fixed_to_container_layer;
+  SetNeedsCommit();
+}
+
+void Layer::PushPropertiesTo(LayerImpl* layer) {
+  layer->SetAnchorPoint(anchor_point_);
+  layer->SetAnchorPointZ(anchor_point_z_);
+  layer->SetBackgroundColor(background_color_);
+  layer->SetBounds(bounds_);
+  layer->SetContentBounds(content_bounds());
+  layer->SetContentsScale(contents_scale_x(), contents_scale_y());
+  layer->SetDebugName(debug_name_);
+  layer->SetDoubleSided(double_sided_);
+  layer->SetDrawCheckerboardForMissingTiles(
+      draw_checkerboard_for_missing_tiles_);
+  layer->SetForceRenderSurface(force_render_surface_);
+  layer->SetDrawsContent(DrawsContent());
+  layer->SetFilters(filters());
+  layer->SetFilter(filter());
+  layer->SetBackgroundFilters(background_filters());
+  layer->SetMasksToBounds(masks_to_bounds_);
+  layer->SetShouldScrollOnMainThread(should_scroll_on_main_thread_);
+  layer->SetHaveWheelEventHandlers(have_wheel_event_handlers_);
+  layer->SetNonFastScrollableRegion(non_fast_scrollable_region_);
+  layer->SetTouchEventHandlerRegion(touch_event_handler_region_);
+  layer->SetContentsOpaque(contents_opaque_);
+  if (!OpacityIsAnimating())
+    layer->SetOpacity(opacity_);
+  layer->SetPosition(position_);
+  layer->SetIsContainerForFixedPositionLayers(
+      is_container_for_fixed_position_layers_);
+  layer->SetFixedToContainerLayer(fixed_to_container_layer_);
+  layer->SetPreserves3d(preserves_3d());
+  layer->SetUseParentBackfaceVisibility(use_parent_backface_visibility_);
+  layer->SetSublayerTransform(sublayer_transform_);
+  if (!TransformIsAnimating())
+    layer->SetTransform(transform_);
+
+  layer->SetScrollable(scrollable_);
+  layer->SetScrollOffset(scroll_offset_);
+  layer->SetMaxScrollOffset(max_scroll_offset_);
+
+  // If the main thread commits multiple times before the impl thread actually
+  // draws, then damage tracking will become incorrect if we simply clobber the
+  // updateRect here. The LayerImpl's updateRect needs to accumulate (i.e.
+  // union) any update changes that have occurred on the main thread.
+  update_rect_.Union(layer->update_rect());
+  layer->set_update_rect(update_rect_);
+
+  if (layer->layer_tree_impl()->settings().implSidePainting) {
+    DCHECK(layer->layer_tree_impl()->IsPendingTree());
+    LayerImpl* active_twin =
+        layer->layer_tree_impl()->FindActiveTreeLayerById(id());
+    // Update the scroll delta from the active layer, which may have
+    // adjusted its scroll delta prior to this pending layer being created.
+    // This code is identical to that in LayerImpl::setScrollDelta.
+    if (active_twin) {
+      DCHECK(layer->sent_scroll_delta().IsZero());
+      layer->SetScrollDelta(active_twin->scroll_delta() -
+                            active_twin->sent_scroll_delta());
     }
-
-    m_layerAnimationController = LayerAnimationController::Create(m_layerId);
-    m_layerAnimationController->AddObserver(this);
-    addLayerAnimationEventObserver(m_layerAnimationController.get());
-}
-
-Layer::~Layer()
-{
-    // Our parent should be holding a reference to us so there should be no
-    // way for us to be destroyed while we still have a parent.
-    DCHECK(!parent());
-
-    m_layerAnimationController->RemoveObserver(this);
-
-    // Remove the parent reference from all children and dependents.
-    removeAllChildren();
-    if (m_maskLayer) {
-        DCHECK_EQ(this, m_maskLayer->parent());
-        m_maskLayer->removeFromParent();
-    }
-    if (m_replicaLayer) {
-        DCHECK_EQ(this, m_replicaLayer->parent());
-        m_replicaLayer->removeFromParent();
-    }
-}
-
-void Layer::setLayerTreeHost(LayerTreeHost* host)
-{
-    if (m_layerTreeHost == host)
-        return;
-
-    m_layerTreeHost = host;
-
-    for (size_t i = 0; i < m_children.size(); ++i)
-        m_children[i]->setLayerTreeHost(host);
-
-    if (m_maskLayer)
-        m_maskLayer->setLayerTreeHost(host);
-    if (m_replicaLayer)
-        m_replicaLayer->setLayerTreeHost(host);
-
-    m_layerAnimationController->SetAnimationRegistrar(host ? host->animationRegistrar() : 0);
-
-    if (host && m_layerAnimationController->has_any_animation())
-        host->setNeedsCommit();
-    if (host && (!m_filters.isEmpty() || !m_backgroundFilters.isEmpty() || m_filter))
-        m_layerTreeHost->setNeedsFilterContext();
-
-}
-
-void Layer::setNeedsCommit()
-{
-    if (m_ignoreSetNeedsCommit)
-        return;
-    if (m_layerTreeHost)
-        m_layerTreeHost->setNeedsCommit();
-}
-
-void Layer::setNeedsFullTreeSync()
-{
-    if (m_layerTreeHost)
-        m_layerTreeHost->setNeedsFullTreeSync();
-}
-
-gfx::Rect Layer::layerRectToContentRect(const gfx::RectF& layerRect) const
-{
-    gfx::RectF contentRect = gfx::ScaleRect(layerRect, contentsScaleX(), contentsScaleY());
-    // Intersect with content rect to avoid the extra pixel because for some
-    // values x and y, ceil((x / y) * y) may be x + 1.
-    contentRect.Intersect(gfx::Rect(gfx::Point(), contentBounds()));
-    return gfx::ToEnclosingRect(contentRect);
-}
-
-bool Layer::blocksPendingCommit() const
-{
+  } else {
+    layer->SetScrollDelta(layer->scroll_delta() - layer->sent_scroll_delta());
+    layer->SetSentScrollDelta(gfx::Vector2d());
+  }
+
+  layer->SetStackingOrderChanged(stacking_order_changed_);
+
+  layer_animation_controller_->PushAnimationUpdatesTo(
+      layer->layer_animation_controller());
+
+  // Reset any state that should be cleared for the next update.
+  stacking_order_changed_ = false;
+  update_rect_ = gfx::RectF();
+}
+
+scoped_ptr<LayerImpl> Layer::CreateLayerImpl(LayerTreeImpl* tree_impl) {
+  return LayerImpl::Create(tree_impl, layer_id_);
+}
+
+bool Layer::DrawsContent() const {
+  return is_drawable_;
+}
+
+bool Layer::NeedMoreUpdates() {
+  return false;
+}
+
+void Layer::SetDebugName(const std::string& debug_name) {
+  debug_name_ = debug_name;
+  SetNeedsCommit();
+}
+
+void Layer::SetRasterScale(float scale) {
+  if (raster_scale_ == scale)
+    return;
+  raster_scale_ = scale;
+
+  // When automatically computed, this acts like a draw property.
+  if (automatically_compute_raster_scale_)
+    return;
+  SetNeedsDisplay();
+}
+
+void Layer::SetAutomaticallyComputeRasterScale(bool automatic) {
+  if (automatically_compute_raster_scale_ == automatic)
+    return;
+  automatically_compute_raster_scale_ = automatic;
+
+  if (automatically_compute_raster_scale_)
+    ForceAutomaticRasterScaleToBeRecomputed();
+  else
+    SetRasterScale(1);
+}
+
+void Layer::ForceAutomaticRasterScaleToBeRecomputed() {
+  if (!automatically_compute_raster_scale_)
+    return;
+  if (!raster_scale_)
+    return;
+  raster_scale_ = 0.f;
+  SetNeedsCommit();
+}
+
+void Layer::SetBoundsContainPageScale(bool bounds_contain_page_scale) {
+  for (size_t i = 0; i < children_.size(); ++i)
+    children_[i]->SetBoundsContainPageScale(bounds_contain_page_scale);
+
+  if (bounds_contain_page_scale == bounds_contain_page_scale_)
+    return;
+
+  bounds_contain_page_scale_ = bounds_contain_page_scale;
+  SetNeedsDisplay();
+}
+
+void Layer::CreateRenderSurface() {
+  DCHECK(!draw_properties_.render_surface);
+  draw_properties_.render_surface = make_scoped_ptr(new RenderSurface(this));
+  draw_properties_.render_target = this;
+}
+
+void Layer::OnOpacityAnimated(float opacity) {
+  // This is called due to an ongoing accelerated animation. Since this
+  // animation is also being run on the impl thread, there is no need to request
+  // a commit to push this value over, so set the value directly rather than
+  // calling setOpacity.
+  opacity_ = opacity;
+}
+
+void Layer::OnTransformAnimated(const gfx::Transform& transform) {
+  // This is called due to an ongoing accelerated animation. Since this
+  // animation is also being run on the impl thread, there is no need to request
+  // a commit to push this value over, so set this value directly rather than
+  // calling setTransform.
+  transform_ = transform;
+}
+
+bool Layer::IsActive() const {
+  return true;
+}
+
+bool Layer::AddAnimation(scoped_ptr <Animation> animation) {
+  if (!layer_animation_controller_->animation_registrar())
     return false;
-}
-
-bool Layer::canClipSelf() const
-{
-    return false;
-}
-
-bool Layer::blocksPendingCommitRecursive() const
-{
-    if (blocksPendingCommit())
-        return true;
-    if (maskLayer() && maskLayer()->blocksPendingCommitRecursive())
-        return true;
-    if (replicaLayer() && replicaLayer()->blocksPendingCommitRecursive())
-        return true;
-    for (size_t i = 0; i < m_children.size(); ++i)
-    {
-        if (m_children[i]->blocksPendingCommitRecursive())
-            return true;
-    }
-    return false;
-}
-
-void Layer::setParent(Layer* layer)
-{
-    DCHECK(!layer || !layer->hasAncestor(this));
-    m_parent = layer;
-    setLayerTreeHost(m_parent ? m_parent->layerTreeHost() : 0);
-
-    forceAutomaticRasterScaleToBeRecomputed();
-    if (m_maskLayer)
-        m_maskLayer->forceAutomaticRasterScaleToBeRecomputed();
-    if (m_replicaLayer && m_replicaLayer->m_maskLayer)
-        m_replicaLayer->m_maskLayer->forceAutomaticRasterScaleToBeRecomputed();
-}
-
-bool Layer::hasAncestor(Layer* ancestor) const
-{
-    for (const Layer* layer = parent(); layer; layer = layer->parent()) {
-        if (layer == ancestor)
-            return true;
-    }
-    return false;
-}
-
-void Layer::addChild(scoped_refptr<Layer> child)
-{
-    insertChild(child, m_children.size());
-}
-
-void Layer::insertChild(scoped_refptr<Layer> child, size_t index)
-{
-    child->removeFromParent();
-    child->setParent(this);
-    child->m_stackingOrderChanged = true;
-
-    index = std::min(index, m_children.size());
-    m_children.insert(m_children.begin() + index, child);
-    setNeedsFullTreeSync();
-}
-
-void Layer::removeFromParent()
-{
-    if (m_parent)
-        m_parent->removeChildOrDependent(this);
-}
-
-void Layer::removeChildOrDependent(Layer* child)
-{
-    if (m_maskLayer == child) {
-        m_maskLayer->setParent(NULL);
-        m_maskLayer = NULL;
-        setNeedsFullTreeSync();
-        return;
-    }
-    if (m_replicaLayer == child) {
-        m_replicaLayer->setParent(NULL);
-        m_replicaLayer = NULL;
-        setNeedsFullTreeSync();
-        return;
-    }
-
-    for (LayerList::iterator iter = m_children.begin(); iter != m_children.end(); ++iter)
-    {
-        if (*iter != child)
-            continue;
-
-        child->setParent(0);
-        m_children.erase(iter);
-        setNeedsFullTreeSync();
-        return;
-    }
-}
-
-void Layer::replaceChild(Layer* reference, scoped_refptr<Layer> newLayer)
-{
-    DCHECK(reference);
-    DCHECK_EQ(reference->parent(), this);
-
-    if (reference == newLayer)
-        return;
-
-    int referenceIndex = indexOfChild(reference);
-    if (referenceIndex == -1) {
-        NOTREACHED();
-        return;
-    }
-
-    reference->removeFromParent();
-
-    if (newLayer) {
-        newLayer->removeFromParent();
-        insertChild(newLayer, referenceIndex);
-    }
-}
-
-int Layer::indexOfChild(const Layer* reference)
-{
-    for (size_t i = 0; i < m_children.size(); ++i) {
-        if (m_children[i] == reference)
-            return i;
-    }
-    return -1;
-}
-
-void Layer::setBounds(const gfx::Size& size)
-{
-    if (bounds() == size)
-        return;
-
-    bool firstResize = bounds().IsEmpty() && !size.IsEmpty();
-
-    m_bounds = size;
-
-    if (firstResize)
-        setNeedsDisplay();
-    else
-        setNeedsCommit();
-}
-
-Layer* Layer::rootLayer()
-{
-    Layer* layer = this;
-    while (layer->parent())
-        layer = layer->parent();
-    return layer;
-}
-
-void Layer::removeAllChildren()
-{
-    while (m_children.size()) {
-        Layer* layer = m_children[0].get();
-        DCHECK_EQ(this, layer->parent());
-        layer->removeFromParent();
-    }
-}
-
-void Layer::setChildren(const LayerList& children)
-{
-    if (children == m_children)
-        return;
-
-    removeAllChildren();
-    for (size_t i = 0; i < children.size(); ++i)
-        addChild(children[i]);
-}
-
-Layer* Layer::childAt(size_t index)
-{
-  DCHECK_LT(index, m_children.size());
-  return m_children[index].get();
-}
-
-void Layer::setAnchorPoint(const gfx::PointF& anchorPoint)
-{
-    if (m_anchorPoint == anchorPoint)
-        return;
-    m_anchorPoint = anchorPoint;
-    setNeedsCommit();
-}
-
-void Layer::setAnchorPointZ(float anchorPointZ)
-{
-    if (m_anchorPointZ == anchorPointZ)
-        return;
-    m_anchorPointZ = anchorPointZ;
-    setNeedsCommit();
-}
-
-void Layer::setBackgroundColor(SkColor backgroundColor)
-{
-    if (m_backgroundColor == backgroundColor)
-        return;
-    m_backgroundColor = backgroundColor;
-    setNeedsCommit();
-}
-
-void Layer::calculateContentsScale(
-    float idealContentsScale,
-    bool animatingTransformToScreen,
-    float* contentsScaleX,
-    float* contentsScaleY,
-    gfx::Size* contentBounds)
-{
-    *contentsScaleX = 1;
-    *contentsScaleY = 1;
-    *contentBounds = bounds();
-}
-
-void Layer::setMasksToBounds(bool masksToBounds)
-{
-    if (m_masksToBounds == masksToBounds)
-        return;
-    m_masksToBounds = masksToBounds;
-    setNeedsCommit();
-}
-
-void Layer::setMaskLayer(Layer* maskLayer)
-{
-    if (m_maskLayer == maskLayer)
-        return;
-    if (m_maskLayer) {
-        DCHECK_EQ(this, m_maskLayer->parent());
-        m_maskLayer->removeFromParent();
-    }
-    m_maskLayer = maskLayer;
-    if (m_maskLayer) {
-        DCHECK(!m_maskLayer->parent());
-        m_maskLayer->removeFromParent();
-        m_maskLayer->setParent(this);
-        m_maskLayer->setIsMask(true);
-    }
-    setNeedsFullTreeSync();
-}
-
-void Layer::setReplicaLayer(Layer* layer)
-{
-    if (m_replicaLayer == layer)
-        return;
-    if (m_replicaLayer) {
-        DCHECK_EQ(this, m_replicaLayer->parent());
-        m_replicaLayer->removeFromParent();
-    }
-    m_replicaLayer = layer;
-    if (m_replicaLayer) {
-        DCHECK(!m_replicaLayer->parent());
-        m_replicaLayer->removeFromParent();
-        m_replicaLayer->setParent(this);
-    }
-    setNeedsFullTreeSync();
-}
-
-void Layer::setFilters(const WebKit::WebFilterOperations& filters)
-{
-    if (m_filters == filters)
-        return;
-    DCHECK(!m_filter);
-    m_filters = filters;
-    setNeedsCommit();
-    if (!filters.isEmpty() && m_layerTreeHost)
-        m_layerTreeHost->setNeedsFilterContext();
-}
-
-void Layer::setFilter(const skia::RefPtr<SkImageFilter>& filter)
-{
-    if (m_filter.get() == filter.get())
-        return;
-    DCHECK(m_filters.isEmpty());
-    m_filter = filter;
-    setNeedsCommit();
-    if (filter && m_layerTreeHost)
-        m_layerTreeHost->setNeedsFilterContext();
-}
-
-void Layer::setBackgroundFilters(const WebKit::WebFilterOperations& backgroundFilters)
-{
-    if (m_backgroundFilters == backgroundFilters)
-        return;
-    m_backgroundFilters = backgroundFilters;
-    setNeedsCommit();
-    if (!backgroundFilters.isEmpty() && m_layerTreeHost)
-        m_layerTreeHost->setNeedsFilterContext();
-}
-
-void Layer::setOpacity(float opacity)
-{
-    if (m_opacity == opacity)
-        return;
-    m_opacity = opacity;
-    setNeedsCommit();
-}
-
-float Layer::opacity() const
-{
-    return m_opacity;
-}
-
-bool Layer::opacityIsAnimating() const
-{
-    return m_layerAnimationController->IsAnimatingProperty(Animation::Opacity);
-}
-
-void Layer::setContentsOpaque(bool opaque)
-{
-    if (m_contentsOpaque == opaque)
-        return;
-    m_contentsOpaque = opaque;
-    setNeedsCommit();
-}
-
-void Layer::setPosition(const gfx::PointF& position)
-{
-    if (m_position == position)
-        return;
-    m_position = position;
-    setNeedsCommit();
-}
-
-void Layer::setSublayerTransform(const gfx::Transform& sublayerTransform)
-{
-    if (m_sublayerTransform == sublayerTransform)
-        return;
-    m_sublayerTransform = sublayerTransform;
-    setNeedsCommit();
-}
-
-void Layer::setTransform(const gfx::Transform& transform)
-{
-    if (m_transform == transform)
-        return;
-    m_transform = transform;
-    setNeedsCommit();
-}
-
-const gfx::Transform& Layer::transform() const
-{
-    return m_transform;
-}
-
-bool Layer::transformIsAnimating() const
-{
-    return m_layerAnimationController->IsAnimatingProperty(Animation::Transform);
-}
-
-void Layer::setScrollOffset(gfx::Vector2d scrollOffset)
-{
-    if (m_scrollOffset == scrollOffset)
-        return;
-    m_scrollOffset = scrollOffset;
-    if (m_layerScrollClient)
-        m_layerScrollClient->didScroll();
-    setNeedsCommit();
-}
-
-void Layer::setMaxScrollOffset(gfx::Vector2d maxScrollOffset)
-{
-    if (m_maxScrollOffset == maxScrollOffset)
-        return;
-    m_maxScrollOffset = maxScrollOffset;
-    setNeedsCommit();
-}
-
-void Layer::setScrollable(bool scrollable)
-{
-    if (m_scrollable == scrollable)
-        return;
-    m_scrollable = scrollable;
-    setNeedsCommit();
-}
-
-void Layer::setShouldScrollOnMainThread(bool shouldScrollOnMainThread)
-{
-    if (m_shouldScrollOnMainThread == shouldScrollOnMainThread)
-        return;
-    m_shouldScrollOnMainThread = shouldScrollOnMainThread;
-    setNeedsCommit();
-}
-
-void Layer::setHaveWheelEventHandlers(bool haveWheelEventHandlers)
-{
-    if (m_haveWheelEventHandlers == haveWheelEventHandlers)
-        return;
-    m_haveWheelEventHandlers = haveWheelEventHandlers;
-    setNeedsCommit();
-}
-
-void Layer::setNonFastScrollableRegion(const Region& region)
-{
-    if (m_nonFastScrollableRegion == region)
-        return;
-    m_nonFastScrollableRegion = region;
-    setNeedsCommit();
-}
-
-void Layer::setTouchEventHandlerRegion(const Region& region)
-{
-    if (m_touchEventHandlerRegion == region)
-        return;
-    m_touchEventHandlerRegion = region;
-}
-
-void Layer::setDrawCheckerboardForMissingTiles(bool checkerboard)
-{
-    if (m_drawCheckerboardForMissingTiles == checkerboard)
-        return;
-    m_drawCheckerboardForMissingTiles = checkerboard;
-    setNeedsCommit();
-}
-
-void Layer::setForceRenderSurface(bool force)
-{
-    if (m_forceRenderSurface == force)
-        return;
-    m_forceRenderSurface = force;
-    setNeedsCommit();
-}
-
-void Layer::setImplTransform(const gfx::Transform& transform)
-{
-    if (m_implTransform == transform)
-        return;
-    m_implTransform = transform;
-    setNeedsCommit();
-}
-
-void Layer::setDoubleSided(bool doubleSided)
-{
-    if (m_doubleSided == doubleSided)
-        return;
-    m_doubleSided = doubleSided;
-    setNeedsCommit();
-}
-
-void Layer::setIsDrawable(bool isDrawable)
-{
-    if (m_isDrawable == isDrawable)
-        return;
-
-    m_isDrawable = isDrawable;
-    setNeedsCommit();
-}
-
-void Layer::setNeedsDisplayRect(const gfx::RectF& dirtyRect)
-{
-    m_updateRect.Union(dirtyRect);
-    m_needsDisplay = true;
-
-    // Simply mark the contents as dirty. For non-root layers, the call to
-    // setNeedsCommit will schedule a fresh compositing pass.
-    // For the root layer, setNeedsCommit has no effect.
-    if (drawsContent() && !m_updateRect.IsEmpty())
-        setNeedsCommit();
-}
-
-bool Layer::descendantIsFixedToContainerLayer() const
-{
-    for (size_t i = 0; i < m_children.size(); ++i) {
-        if (m_children[i]->fixedToContainerLayer() || m_children[i]->descendantIsFixedToContainerLayer())
-            return true;
-    }
-    return false;
-}
-
-void Layer::setIsContainerForFixedPositionLayers(bool isContainerForFixedPositionLayers)
-{
-    if (m_isContainerForFixedPositionLayers == isContainerForFixedPositionLayers)
-        return;
-    m_isContainerForFixedPositionLayers = isContainerForFixedPositionLayers;
-
-    if (m_layerTreeHost && m_layerTreeHost->commitRequested())
-        return;
-
-    // Only request a commit if we have a fixed positioned descendant.
-    if (descendantIsFixedToContainerLayer())
-        setNeedsCommit();
-}
-
-void Layer::setFixedToContainerLayer(bool fixedToContainerLayer)
-{
-    if (m_fixedToContainerLayer == fixedToContainerLayer)
-        return;
-    m_fixedToContainerLayer = fixedToContainerLayer;
-    setNeedsCommit();
-}
-
-void Layer::pushPropertiesTo(LayerImpl* layer)
-{
-    layer->setAnchorPoint(m_anchorPoint);
-    layer->setAnchorPointZ(m_anchorPointZ);
-    layer->setBackgroundColor(m_backgroundColor);
-    layer->setBounds(m_bounds);
-    layer->setContentBounds(contentBounds());
-    layer->setContentsScale(contentsScaleX(), contentsScaleY());
-    layer->setDebugName(m_debugName);
-    layer->setDoubleSided(m_doubleSided);
-    layer->setDrawCheckerboardForMissingTiles(m_drawCheckerboardForMissingTiles);
-    layer->setForceRenderSurface(m_forceRenderSurface);
-    layer->setDrawsContent(drawsContent());
-    layer->setFilters(filters());
-    layer->setFilter(filter());
-    layer->setBackgroundFilters(backgroundFilters());
-    layer->setMasksToBounds(m_masksToBounds);
-    layer->setShouldScrollOnMainThread(m_shouldScrollOnMainThread);
-    layer->setHaveWheelEventHandlers(m_haveWheelEventHandlers);
-    layer->setNonFastScrollableRegion(m_nonFastScrollableRegion);
-    layer->setTouchEventHandlerRegion(m_touchEventHandlerRegion);
-    layer->setContentsOpaque(m_contentsOpaque);
-    if (!opacityIsAnimating())
-        layer->setOpacity(m_opacity);
-    layer->setPosition(m_position);
-    layer->setIsContainerForFixedPositionLayers(m_isContainerForFixedPositionLayers);
-    layer->setFixedToContainerLayer(m_fixedToContainerLayer);
-    layer->setPreserves3D(preserves3D());
-    layer->setUseParentBackfaceVisibility(m_useParentBackfaceVisibility);
-    layer->setSublayerTransform(m_sublayerTransform);
-    if (!transformIsAnimating())
-        layer->setTransform(m_transform);
-
-    layer->setScrollable(m_scrollable);
-    layer->setScrollOffset(m_scrollOffset);
-    layer->setMaxScrollOffset(m_maxScrollOffset);
-
-    // If the main thread commits multiple times before the impl thread actually draws, then damage tracking
-    // will become incorrect if we simply clobber the updateRect here. The LayerImpl's updateRect needs to
-    // accumulate (i.e. union) any update changes that have occurred on the main thread.
-    m_updateRect.Union(layer->updateRect());
-    layer->setUpdateRect(m_updateRect);
-
-    if (layer->layerTreeImpl()->settings().implSidePainting) {
-        DCHECK(layer->layerTreeImpl()->IsPendingTree());
-        LayerImpl* active_twin = layer->layerTreeImpl()->FindActiveTreeLayerById(id());
-        // Update the scroll delta from the active layer, which may have
-        // adjusted its scroll delta prior to this pending layer being created.
-        // This code is identical to that in LayerImpl::setScrollDelta.
-        if (active_twin) {
-            DCHECK(layer->sentScrollDelta().IsZero());
-            layer->setScrollDelta(active_twin->scrollDelta() - active_twin->sentScrollDelta());
-        }
-    } else {
-        layer->setScrollDelta(layer->scrollDelta() - layer->sentScrollDelta());
-        layer->setSentScrollDelta(gfx::Vector2d());
-    }
-
-    layer->setStackingOrderChanged(m_stackingOrderChanged);
-
-    m_layerAnimationController->PushAnimationUpdatesTo(layer->layerAnimationController());
-
-    // Reset any state that should be cleared for the next update.
-    m_stackingOrderChanged = false;
-    m_updateRect = gfx::RectF();
-}
-
-scoped_ptr<LayerImpl> Layer::createLayerImpl(LayerTreeImpl* treeImpl)
-{
-    return LayerImpl::create(treeImpl, m_layerId);
-}
-
-bool Layer::drawsContent() const
-{
-    return m_isDrawable;
-}
-
-bool Layer::needMoreUpdates()
-{
-    return false;
-}
-
-void Layer::setDebugName(const std::string& debugName)
-{
-    m_debugName = debugName;
-    setNeedsCommit();
-}
-
-void Layer::setRasterScale(float scale)
-{
-    if (m_rasterScale == scale)
-        return;
-    m_rasterScale = scale;
-
-    // When automatically computed, this acts like a draw property.
-    if (m_automaticallyComputeRasterScale)
-        return;
-    setNeedsDisplay();
-}
-
-void Layer::setAutomaticallyComputeRasterScale(bool automatic)
-{
-    if (m_automaticallyComputeRasterScale == automatic)
-        return;
-    m_automaticallyComputeRasterScale = automatic;
-
-    if (m_automaticallyComputeRasterScale)
-        forceAutomaticRasterScaleToBeRecomputed();
-    else
-        setRasterScale(1);
-}
-
-void Layer::forceAutomaticRasterScaleToBeRecomputed()
-{
-    if (!m_automaticallyComputeRasterScale)
-        return;
-    if (!m_rasterScale)
-        return;
-    m_rasterScale = 0;
-    setNeedsCommit();
-}
-
-void Layer::setBoundsContainPageScale(bool boundsContainPageScale)
-{
-    for (size_t i = 0; i < m_children.size(); ++i)
-        m_children[i]->setBoundsContainPageScale(boundsContainPageScale);
-
-    if (boundsContainPageScale == m_boundsContainPageScale)
-        return;
-
-    m_boundsContainPageScale = boundsContainPageScale;
-    setNeedsDisplay();
-}
-
-void Layer::createRenderSurface()
-{
-    DCHECK(!m_drawProperties.render_surface);
-    m_drawProperties.render_surface = make_scoped_ptr(new RenderSurface(this));
-    m_drawProperties.render_target = this;
-}
-
-int Layer::id() const
-{
-    return m_layerId;
-}
-
-void Layer::OnOpacityAnimated(float opacity)
-{
-    // This is called due to an ongoing accelerated animation. Since this animation is
-    // also being run on the impl thread, there is no need to request a commit to push
-    // this value over, so set the value directly rather than calling setOpacity.
-    m_opacity = opacity;
-}
-
-void Layer::OnTransformAnimated(const gfx::Transform& transform)
-{
-    // This is called due to an ongoing accelerated animation. Since this animation is
-    // also being run on the impl thread, there is no need to request a commit to push
-    // this value over, so set this value directly rather than calling setTransform.
-    m_transform = transform;
-}
-
-bool Layer::IsActive() const
-{
-    return true;
-}
-
-bool Layer::AddAnimation(scoped_ptr <Animation> animation)
-{
-    if (!m_layerAnimationController->animation_registrar())
-        return false;
-
-    m_layerAnimationController->AddAnimation(animation.Pass());
-    setNeedsCommit();
-    return true;
-}
-
-void Layer::PauseAnimation(int animationId, double timeOffset)
-{
-    m_layerAnimationController->PauseAnimation(animationId, timeOffset);
-    setNeedsCommit();
-}
-
-void Layer::RemoveAnimation(int animationId)
-{
-    m_layerAnimationController->RemoveAnimation(animationId);
-    setNeedsCommit();
-}
-
-void Layer::suspendAnimations(double monotonicTime)
-{
-    m_layerAnimationController->SuspendAnimations(monotonicTime);
-    setNeedsCommit();
-}
-
-void Layer::resumeAnimations(double monotonicTime)
-{
-    m_layerAnimationController->ResumeAnimations(monotonicTime);
-    setNeedsCommit();
-}
-
-void Layer::setLayerAnimationController(scoped_refptr<LayerAnimationController> layerAnimationController)
-{
-    removeLayerAnimationEventObserver(m_layerAnimationController.get());
-    m_layerAnimationController->RemoveObserver(this);
-    m_layerAnimationController = layerAnimationController;
-    m_layerAnimationController->set_force_sync();
-    m_layerAnimationController->AddObserver(this);
-    addLayerAnimationEventObserver(m_layerAnimationController.get());
-    setNeedsCommit();
-}
-
-scoped_refptr<LayerAnimationController> Layer::releaseLayerAnimationController()
-{
-    m_layerAnimationController->RemoveObserver(this);
-    scoped_refptr<LayerAnimationController> toReturn = m_layerAnimationController;
-    m_layerAnimationController = LayerAnimationController::Create(id());
-    m_layerAnimationController->AddObserver(this);
-    m_layerAnimationController->SetAnimationRegistrar(toReturn->animation_registrar());
-    return toReturn;
-}
-
-bool Layer::hasActiveAnimation() const
-{
-    return m_layerAnimationController->HasActiveAnimation();
-}
-
-void Layer::notifyAnimationStarted(const AnimationEvent& event, double wallClockTime)
-{
-    FOR_EACH_OBSERVER(LayerAnimationEventObserver, m_layerAnimationObservers,
-                      OnAnimationStarted(event));
-    if (m_layerAnimationDelegate)
-        m_layerAnimationDelegate->notifyAnimationStarted(wallClockTime);
-}
-
-void Layer::notifyAnimationFinished(double wallClockTime)
-{
-    if (m_layerAnimationDelegate)
-        m_layerAnimationDelegate->notifyAnimationFinished(wallClockTime);
-}
-
-void Layer::notifyAnimationPropertyUpdate(const AnimationEvent& event)
-{
-    if (event.target_property == Animation::Opacity)
-        setOpacity(event.opacity);
-    else
-        setTransform(event.transform);
-}
-
-void Layer::addLayerAnimationEventObserver(LayerAnimationEventObserver* animationObserver)
-{
-    if (!m_layerAnimationObservers.HasObserver(animationObserver))
-        m_layerAnimationObservers.AddObserver(animationObserver);
-}
-
-void Layer::removeLayerAnimationEventObserver(LayerAnimationEventObserver* animationObserver)
-{
-    m_layerAnimationObservers.RemoveObserver(animationObserver);
-}
-
-Region Layer::visibleContentOpaqueRegion() const
-{
-    if (contentsOpaque())
-        return visibleContentRect();
-    return Region();
-}
-
-ScrollbarLayer* Layer::toScrollbarLayer()
-{
-    return 0;
-}
-
-void sortLayers(std::vector<scoped_refptr<Layer> >::iterator, std::vector<scoped_refptr<Layer> >::iterator, void*)
-{
-    // Currently we don't use z-order to decide what to paint, so there's no need to actually sort Layers.
+
+  layer_animation_controller_->AddAnimation(animation.Pass());
+  SetNeedsCommit();
+  return true;
+}
+
+void Layer::PauseAnimation(int animation_id, double time_offset) {
+  layer_animation_controller_->PauseAnimation(animation_id, time_offset);
+  SetNeedsCommit();
+}
+
+void Layer::RemoveAnimation(int animation_id) {
+  layer_animation_controller_->RemoveAnimation(animation_id);
+  SetNeedsCommit();
+}
+
+void Layer::SuspendAnimations(double monotonic_time) {
+  layer_animation_controller_->SuspendAnimations(monotonic_time);
+  SetNeedsCommit();
+}
+
+void Layer::ResumeAnimations(double monotonic_time) {
+  layer_animation_controller_->ResumeAnimations(monotonic_time);
+  SetNeedsCommit();
+}
+
+void Layer::SetLayerAnimationController(
+    scoped_refptr<LayerAnimationController> controller) {
+  RemoveLayerAnimationEventObserver(layer_animation_controller_.get());
+  layer_animation_controller_->RemoveObserver(this);
+  layer_animation_controller_ = controller;
+  layer_animation_controller_->set_force_sync();
+  layer_animation_controller_->AddObserver(this);
+  AddLayerAnimationEventObserver(layer_animation_controller_.get());
+  SetNeedsCommit();
+}
+
+scoped_refptr<LayerAnimationController>
+Layer::ReleaseLayerAnimationController() {
+  layer_animation_controller_->RemoveObserver(this);
+  scoped_refptr<LayerAnimationController> to_return =
+      layer_animation_controller_;
+  layer_animation_controller_ = LayerAnimationController::Create(id());
+  layer_animation_controller_->AddObserver(this);
+  layer_animation_controller_->SetAnimationRegistrar(
+      to_return->animation_registrar());
+  return to_return;
+}
+
+bool Layer::HasActiveAnimation() const {
+  return layer_animation_controller_->HasActiveAnimation();
+}
+
+void Layer::NotifyAnimationStarted(const AnimationEvent& event,
+                                   double wall_clock_time) {
+  FOR_EACH_OBSERVER(LayerAnimationEventObserver, layer_animation_observers_,
+                    OnAnimationStarted(event));
+  if (layer_animation_delegate_)
+    layer_animation_delegate_->notifyAnimationStarted(wall_clock_time);
+}
+
+void Layer::NotifyAnimationFinished(double wall_clock_time) {
+  if (layer_animation_delegate_)
+    layer_animation_delegate_->notifyAnimationFinished(wall_clock_time);
+}
+
+void Layer::NotifyAnimationPropertyUpdate(const AnimationEvent& event) {
+  if (event.target_property == Animation::Opacity)
+    SetOpacity(event.opacity);
+  else
+    SetTransform(event.transform);
+}
+
+void Layer::AddLayerAnimationEventObserver(
+    LayerAnimationEventObserver* animation_observer) {
+  if (!layer_animation_observers_.HasObserver(animation_observer))
+    layer_animation_observers_.AddObserver(animation_observer);
+}
+
+void Layer::RemoveLayerAnimationEventObserver(
+    LayerAnimationEventObserver* animation_observer) {
+  layer_animation_observers_.RemoveObserver(animation_observer);
+}
+
+Region Layer::VisibleContentOpaqueRegion() const {
+  if (contents_opaque())
+    return visible_content_rect();
+  return Region();
+}
+
+ScrollbarLayer* Layer::ToScrollbarLayer() {
+  return NULL;
 }
 
 }  // namespace cc