Remove parts of //cc we aren't using

cc/layers/picture_layer_impl.cc

Index: cc/layers/picture_layer_impl.cc
diff --git a/cc/layers/picture_layer_impl.cc b/cc/layers/picture_layer_impl.cc
deleted file mode 100644
index e1b3724738ee89c0a84b6b71eefa72f2693e4dfd..0000000000000000000000000000000000000000
--- a/cc/layers/picture_layer_impl.cc
+++ /dev/null
@@ -1,1242 +0,0 @@
-// 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/layers/picture_layer_impl.h"
-
-#include <algorithm>
-#include <cmath>
-#include <limits>
-#include <set>
-
-#include "base/time/time.h"
-#include "base/trace_event/trace_event_argument.h"
-#include "cc/base/math_util.h"
-#include "cc/base/util.h"
-#include "cc/debug/debug_colors.h"
-#include "cc/debug/micro_benchmark_impl.h"
-#include "cc/debug/traced_value.h"
-#include "cc/layers/append_quads_data.h"
-#include "cc/layers/solid_color_layer_impl.h"
-#include "cc/output/begin_frame_args.h"
-#include "cc/quads/checkerboard_draw_quad.h"
-#include "cc/quads/debug_border_draw_quad.h"
-#include "cc/quads/picture_draw_quad.h"
-#include "cc/quads/solid_color_draw_quad.h"
-#include "cc/quads/tile_draw_quad.h"
-#include "cc/resources/tile_manager.h"
-#include "cc/resources/tiling_set_raster_queue_all.h"
-#include "cc/trees/layer_tree_impl.h"
-#include "cc/trees/occlusion.h"
-#include "ui/gfx/geometry/quad_f.h"
-#include "ui/gfx/geometry/rect_conversions.h"
-#include "ui/gfx/geometry/size_conversions.h"
-
-namespace {
-// This must be > 1 as we multiply or divide by this to find a new raster
-// scale during pinch.
-const float kMaxScaleRatioDuringPinch = 2.0f;
-
-// When creating a new tiling during pinch, snap to an existing
-// tiling's scale if the desired scale is within this ratio.
-const float kSnapToExistingTilingRatio = 1.2f;
-
-// Even for really wide viewports, at some point GPU raster should use
-// less than 4 tiles to fill the viewport. This is set to 256 as a
-// sane minimum for now, but we might want to tune this for low-end.
-const int kMinHeightForGpuRasteredTile = 256;
-
-// When making odd-sized tiles, round them up to increase the chances
-// of using the same tile size.
-const int kTileRoundUp = 64;
-
-}  // namespace
-
-namespace cc {
-
-PictureLayerImpl::Pair::Pair() : active(nullptr), pending(nullptr) {
-}
-
-PictureLayerImpl::Pair::Pair(PictureLayerImpl* active_layer,
-                             PictureLayerImpl* pending_layer)
-    : active(active_layer), pending(pending_layer) {
-}
-
-PictureLayerImpl::Pair::~Pair() {
-}
-
-PictureLayerImpl::PictureLayerImpl(
-    LayerTreeImpl* tree_impl,
-    int id,
-    bool is_mask,
-    scoped_refptr<SyncedScrollOffset> scroll_offset)
-    : LayerImpl(tree_impl, id, scroll_offset),
-      twin_layer_(nullptr),
-      tilings_(CreatePictureLayerTilingSet()),
-      ideal_page_scale_(0.f),
-      ideal_device_scale_(0.f),
-      ideal_source_scale_(0.f),
-      ideal_contents_scale_(0.f),
-      raster_page_scale_(0.f),
-      raster_device_scale_(0.f),
-      raster_source_scale_(0.f),
-      raster_contents_scale_(0.f),
-      low_res_raster_contents_scale_(0.f),
-      raster_source_scale_is_fixed_(false),
-      was_screen_space_transform_animating_(false),
-      only_used_low_res_last_append_quads_(false),
-      is_mask_(is_mask),
-      nearest_neighbor_(false) {
-  layer_tree_impl()->RegisterPictureLayerImpl(this);
-}
-
-PictureLayerImpl::~PictureLayerImpl() {
-  if (twin_layer_)
-    twin_layer_->twin_layer_ = nullptr;
-  layer_tree_impl()->UnregisterPictureLayerImpl(this);
-}
-
-const char* PictureLayerImpl::LayerTypeAsString() const {
-  return "cc::PictureLayerImpl";
-}
-
-scoped_ptr<LayerImpl> PictureLayerImpl::CreateLayerImpl(
-    LayerTreeImpl* tree_impl) {
-  return PictureLayerImpl::Create(tree_impl, id(), is_mask_,
-                                  synced_scroll_offset());
-}
-
-void PictureLayerImpl::PushPropertiesTo(LayerImpl* base_layer) {
-  PictureLayerImpl* layer_impl = static_cast<PictureLayerImpl*>(base_layer);
-  DCHECK_EQ(layer_impl->is_mask_, is_mask_);
-
-  LayerImpl::PushPropertiesTo(base_layer);
-
-  // Twin relationships should never change once established.
-  DCHECK_IMPLIES(twin_layer_, twin_layer_ == layer_impl);
-  DCHECK_IMPLIES(twin_layer_, layer_impl->twin_layer_ == this);
-  // The twin relationship does not need to exist before the first
-  // PushPropertiesTo from pending to active layer since before that the active
-  // layer can not have a pile or tilings, it has only been created and inserted
-  // into the tree at that point.
-  twin_layer_ = layer_impl;
-  layer_impl->twin_layer_ = this;
-
-  layer_impl->SetNearestNeighbor(nearest_neighbor_);
-
-  // Solid color layers have no tilings.
-  DCHECK_IMPLIES(raster_source_->IsSolidColor(), tilings_->num_tilings() == 0);
-  // The pending tree should only have a high res (and possibly low res) tiling.
-  DCHECK_LE(tilings_->num_tilings(),
-            layer_tree_impl()->create_low_res_tiling() ? 2u : 1u);
-
-  layer_impl->set_gpu_raster_max_texture_size(gpu_raster_max_texture_size_);
-  layer_impl->UpdateRasterSource(raster_source_, &invalidation_,
-                                 tilings_.get());
-  DCHECK(invalidation_.IsEmpty());
-
-  // After syncing a solid color layer, the active layer has no tilings.
-  DCHECK_IMPLIES(raster_source_->IsSolidColor(),
-                 layer_impl->tilings_->num_tilings() == 0);
-
-  layer_impl->raster_page_scale_ = raster_page_scale_;
-  layer_impl->raster_device_scale_ = raster_device_scale_;
-  layer_impl->raster_source_scale_ = raster_source_scale_;
-  layer_impl->raster_contents_scale_ = raster_contents_scale_;
-  layer_impl->low_res_raster_contents_scale_ = low_res_raster_contents_scale_;
-
-  layer_impl->SanityCheckTilingState();
-
-  // We always need to push properties.
-  // See http://crbug.com/303943
-  // TODO(danakj): Stop always pushing properties since we don't swap tilings.
-  needs_push_properties_ = true;
-}
-
-void PictureLayerImpl::AppendQuads(RenderPass* render_pass,
-                                   AppendQuadsData* append_quads_data) {
-  // The bounds and the pile size may differ if the pile wasn't updated (ie.
-  // PictureLayer::Update didn't happen). In that case the pile will be empty.
-  DCHECK_IMPLIES(!raster_source_->GetSize().IsEmpty(),
-                 bounds() == raster_source_->GetSize())
-      << " bounds " << bounds().ToString() << " pile "
-      << raster_source_->GetSize().ToString();
-
-  SharedQuadState* shared_quad_state =
-      render_pass->CreateAndAppendSharedQuadState();
-
-  if (raster_source_->IsSolidColor()) {
-    PopulateSharedQuadState(shared_quad_state);
-
-    AppendDebugBorderQuad(
-        render_pass, bounds(), shared_quad_state, append_quads_data);
-
-    SolidColorLayerImpl::AppendSolidQuads(
-        render_pass, draw_properties().occlusion_in_content_space,
-        shared_quad_state, visible_content_rect(),
-        raster_source_->GetSolidColor(), append_quads_data);
-    return;
-  }
-
-  float max_contents_scale = MaximumTilingContentsScale();
-  PopulateScaledSharedQuadState(shared_quad_state, max_contents_scale);
-  Occlusion scaled_occlusion =
-      draw_properties()
-          .occlusion_in_content_space.GetOcclusionWithGivenDrawTransform(
-              shared_quad_state->content_to_target_transform);
-
-  if (current_draw_mode_ == DRAW_MODE_RESOURCELESS_SOFTWARE) {
-    AppendDebugBorderQuad(
-        render_pass, shared_quad_state->content_bounds, shared_quad_state,
-        append_quads_data, DebugColors::DirectPictureBorderColor(),
-        DebugColors::DirectPictureBorderWidth(layer_tree_impl()));
-
-    gfx::Rect geometry_rect = shared_quad_state->visible_content_rect;
-    gfx::Rect opaque_rect = contents_opaque() ? geometry_rect : gfx::Rect();
-    gfx::Rect visible_geometry_rect =
-        scaled_occlusion.GetUnoccludedContentRect(geometry_rect);
-    if (visible_geometry_rect.IsEmpty())
-      return;
-
-    gfx::Rect quad_content_rect = shared_quad_state->visible_content_rect;
-    gfx::Size texture_size = quad_content_rect.size();
-    gfx::RectF texture_rect = gfx::RectF(texture_size);
-
-    PictureDrawQuad* quad =
-        render_pass->CreateAndAppendDrawQuad<PictureDrawQuad>();
-    quad->SetNew(shared_quad_state, geometry_rect, opaque_rect,
-                 visible_geometry_rect, texture_rect, texture_size,
-                 nearest_neighbor_, RGBA_8888, quad_content_rect,
-                 max_contents_scale, raster_source_);
-    return;
-  }
-
-  AppendDebugBorderQuad(render_pass, shared_quad_state->content_bounds,
-                        shared_quad_state, append_quads_data);
-
-  if (ShowDebugBorders()) {
-    for (PictureLayerTilingSet::CoverageIterator iter(
-             tilings_.get(), max_contents_scale,
-             shared_quad_state->visible_content_rect, ideal_contents_scale_);
-         iter; ++iter) {
-      SkColor color;
-      float width;
-      if (*iter && iter->IsReadyToDraw()) {
-        TileDrawInfo::Mode mode = iter->draw_info().mode();
-        if (mode == TileDrawInfo::SOLID_COLOR_MODE) {
-          color = DebugColors::SolidColorTileBorderColor();
-          width = DebugColors::SolidColorTileBorderWidth(layer_tree_impl());
-        } else if (mode == TileDrawInfo::OOM_MODE) {
-          color = DebugColors::OOMTileBorderColor();
-          width = DebugColors::OOMTileBorderWidth(layer_tree_impl());
-        } else if (iter.resolution() == HIGH_RESOLUTION) {
-          color = DebugColors::HighResTileBorderColor();
-          width = DebugColors::HighResTileBorderWidth(layer_tree_impl());
-        } else if (iter.resolution() == LOW_RESOLUTION) {
-          color = DebugColors::LowResTileBorderColor();
-          width = DebugColors::LowResTileBorderWidth(layer_tree_impl());
-        } else if (iter->contents_scale() > max_contents_scale) {
-          color = DebugColors::ExtraHighResTileBorderColor();
-          width = DebugColors::ExtraHighResTileBorderWidth(layer_tree_impl());
-        } else {
-          color = DebugColors::ExtraLowResTileBorderColor();
-          width = DebugColors::ExtraLowResTileBorderWidth(layer_tree_impl());
-        }
-      } else {
-        color = DebugColors::MissingTileBorderColor();
-        width = DebugColors::MissingTileBorderWidth(layer_tree_impl());
-      }
-
-      DebugBorderDrawQuad* debug_border_quad =
-          render_pass->CreateAndAppendDrawQuad<DebugBorderDrawQuad>();
-      gfx::Rect geometry_rect = iter.geometry_rect();
-      gfx::Rect visible_geometry_rect = geometry_rect;
-      debug_border_quad->SetNew(shared_quad_state,
-                                geometry_rect,
-                                visible_geometry_rect,
-                                color,
-                                width);
-    }
-  }
-
-  // Keep track of the tilings that were used so that tilings that are
-  // unused can be considered for removal.
-  last_append_quads_tilings_.clear();
-
-  // Ignore missing tiles outside of viewport for tile priority. This is
-  // normally the same as draw viewport but can be independently overridden by
-  // embedders like Android WebView with SetExternalDrawConstraints.
-  gfx::Rect scaled_viewport_for_tile_priority = gfx::ScaleToEnclosingRect(
-      viewport_rect_for_tile_priority_in_content_space_, max_contents_scale);
-
-  size_t missing_tile_count = 0u;
-  size_t on_demand_missing_tile_count = 0u;
-  only_used_low_res_last_append_quads_ = true;
-  for (PictureLayerTilingSet::CoverageIterator iter(
-           tilings_.get(), max_contents_scale,
-           shared_quad_state->visible_content_rect, ideal_contents_scale_);
-       iter; ++iter) {
-    gfx::Rect geometry_rect = iter.geometry_rect();
-    gfx::Rect opaque_rect = contents_opaque() ? geometry_rect : gfx::Rect();
-    gfx::Rect visible_geometry_rect =
-        scaled_occlusion.GetUnoccludedContentRect(geometry_rect);
-    if (visible_geometry_rect.IsEmpty())
-      continue;
-
-    append_quads_data->visible_content_area +=
-        visible_geometry_rect.width() * visible_geometry_rect.height();
-
-    bool has_draw_quad = false;
-    if (*iter && iter->IsReadyToDraw()) {
-      const TileDrawInfo& draw_info = iter->draw_info();
-      switch (draw_info.mode()) {
-        case TileDrawInfo::RESOURCE_MODE: {
-          gfx::RectF texture_rect = iter.texture_rect();
-
-          // The raster_contents_scale_ is the best scale that the layer is
-          // trying to produce, even though it may not be ideal. Since that's
-          // the best the layer can promise in the future, consider those as
-          // complete. But if a tile is ideal scale, we don't want to consider
-          // it incomplete and trying to replace it with a tile at a worse
-          // scale.
-          if (iter->contents_scale() != raster_contents_scale_ &&
-              iter->contents_scale() != ideal_contents_scale_ &&
-              geometry_rect.Intersects(scaled_viewport_for_tile_priority)) {
-            append_quads_data->num_incomplete_tiles++;
-          }
-
-          TileDrawQuad* quad =
-              render_pass->CreateAndAppendDrawQuad<TileDrawQuad>();
-          quad->SetNew(shared_quad_state, geometry_rect, opaque_rect,
-                       visible_geometry_rect, draw_info.resource_id(),
-                       texture_rect, draw_info.resource_size(),
-                       draw_info.contents_swizzled(), nearest_neighbor_);
-          has_draw_quad = true;
-          break;
-        }
-        case TileDrawInfo::SOLID_COLOR_MODE: {
-          SolidColorDrawQuad* quad =
-              render_pass->CreateAndAppendDrawQuad<SolidColorDrawQuad>();
-          quad->SetNew(shared_quad_state, geometry_rect, visible_geometry_rect,
-                       draw_info.solid_color(), false);
-          has_draw_quad = true;
-          break;
-        }
-        case TileDrawInfo::OOM_MODE:
-          break;  // Checkerboard.
-      }
-    }
-
-    if (!has_draw_quad) {
-      if (draw_checkerboard_for_missing_tiles()) {
-        CheckerboardDrawQuad* quad =
-            render_pass->CreateAndAppendDrawQuad<CheckerboardDrawQuad>();
-        SkColor color = DebugColors::DefaultCheckerboardColor();
-        quad->SetNew(shared_quad_state, geometry_rect, visible_geometry_rect,
-                     color, draw_properties().device_scale_factor);
-      } else {
-        SkColor color = SafeOpaqueBackgroundColor();
-        SolidColorDrawQuad* quad =
-            render_pass->CreateAndAppendDrawQuad<SolidColorDrawQuad>();
-        quad->SetNew(shared_quad_state,
-                     geometry_rect,
-                     visible_geometry_rect,
-                     color,
-                     false);
-      }
-
-      if (geometry_rect.Intersects(scaled_viewport_for_tile_priority)) {
-        append_quads_data->num_missing_tiles++;
-        ++missing_tile_count;
-      }
-      append_quads_data->approximated_visible_content_area +=
-          visible_geometry_rect.width() * visible_geometry_rect.height();
-      continue;
-    }
-
-    if (iter.resolution() != HIGH_RESOLUTION) {
-      append_quads_data->approximated_visible_content_area +=
-          visible_geometry_rect.width() * visible_geometry_rect.height();
-    }
-
-    // If we have a draw quad, but it's not low resolution, then
-    // mark that we've used something other than low res to draw.
-    if (iter.resolution() != LOW_RESOLUTION)
-      only_used_low_res_last_append_quads_ = false;
-
-    if (last_append_quads_tilings_.empty() ||
-        last_append_quads_tilings_.back() != iter.CurrentTiling()) {
-      last_append_quads_tilings_.push_back(iter.CurrentTiling());
-    }
-  }
-
-  if (missing_tile_count) {
-    TRACE_EVENT_INSTANT2("cc",
-                         "PictureLayerImpl::AppendQuads checkerboard",
-                         TRACE_EVENT_SCOPE_THREAD,
-                         "missing_tile_count",
-                         missing_tile_count,
-                         "on_demand_missing_tile_count",
-                         on_demand_missing_tile_count);
-  }
-
-  // Aggressively remove any tilings that are not seen to save memory. Note
-  // that this is at the expense of doing cause more frequent re-painting. A
-  // better scheme would be to maintain a tighter visible_content_rect for the
-  // finer tilings.
-  CleanUpTilingsOnActiveLayer(last_append_quads_tilings_);
-}
-
-bool PictureLayerImpl::UpdateTiles(bool resourceless_software_draw) {
-  DCHECK_EQ(1.f, contents_scale_x());
-  DCHECK_EQ(1.f, contents_scale_y());
-
-  if (!resourceless_software_draw) {
-    visible_rect_for_tile_priority_ = visible_content_rect();
-  }
-
-  if (!CanHaveTilings()) {
-    ideal_page_scale_ = 0.f;
-    ideal_device_scale_ = 0.f;
-    ideal_contents_scale_ = 0.f;
-    ideal_source_scale_ = 0.f;
-    SanityCheckTilingState();
-    return false;
-  }
-
-  // Remove any non-ideal tilings that were not used last time we generated
-  // quads to save memory and processing time. Note that pending tree should
-  // only have one or two tilings (high and low res), so only clean up the
-  // active layer. This cleans it up here in case AppendQuads didn't run.
-  // If it did run, this would not remove any additional tilings.
-  if (layer_tree_impl()->IsActiveTree())
-    CleanUpTilingsOnActiveLayer(last_append_quads_tilings_);
-
-  UpdateIdealScales();
-
-  if (!raster_contents_scale_ || ShouldAdjustRasterScale()) {
-    RecalculateRasterScales();
-    AddTilingsForRasterScale();
-  }
-
-  DCHECK(raster_page_scale_);
-  DCHECK(raster_device_scale_);
-  DCHECK(raster_source_scale_);
-  DCHECK(raster_contents_scale_);
-  DCHECK(low_res_raster_contents_scale_);
-
-  was_screen_space_transform_animating_ =
-      draw_properties().screen_space_transform_is_animating;
-
-  if (draw_transform_is_animating())
-    raster_source_->SetShouldAttemptToUseDistanceFieldText();
-
-  double current_frame_time_in_seconds =
-      (layer_tree_impl()->CurrentBeginFrameArgs().frame_time -
-       base::TimeTicks()).InSecondsF();
-  UpdateViewportRectForTilePriorityInContentSpace();
-
-  // The tiling set can require tiles for activation any of the following
-  // conditions are true:
-  // - This layer produced a high-res or non-ideal-res tile last frame.
-  // - We're in requires high res to draw mode.
-  // - We're not in smoothness takes priority mode.
-  // To put different, the tiling set can't require tiles for activation if
-  // we're in smoothness mode and only used low-res or checkerboard to draw last
-  // frame and we don't need high res to draw.
-  //
-  // The reason for this is that we should be able to activate sooner and get a
-  // more up to date recording, so we don't run out of recording on the active
-  // tree.
-  bool can_require_tiles_for_activation =
-      !only_used_low_res_last_append_quads_ || RequiresHighResToDraw() ||
-      !layer_tree_impl()->SmoothnessTakesPriority();
-
-  static const Occlusion kEmptyOcclusion;
-  const Occlusion& occlusion_in_content_space =
-      layer_tree_impl()->settings().use_occlusion_for_tile_prioritization
-          ? draw_properties().occlusion_in_content_space
-          : kEmptyOcclusion;
-
-  // Pass |occlusion_in_content_space| for |occlusion_in_layer_space| since
-  // they are the same space in picture layer, as contents scale is always 1.
-  bool updated = tilings_->UpdateTilePriorities(
-      viewport_rect_for_tile_priority_in_content_space_, ideal_contents_scale_,
-      current_frame_time_in_seconds, occlusion_in_content_space,
-      can_require_tiles_for_activation);
-  return updated;
-}
-
-void PictureLayerImpl::UpdateViewportRectForTilePriorityInContentSpace() {
-  // If visible_rect_for_tile_priority_ is empty or
-  // viewport_rect_for_tile_priority is set to be different from the device
-  // viewport, try to inverse project the viewport into layer space and use
-  // that. Otherwise just use visible_rect_for_tile_priority_
-  gfx::Rect visible_rect_in_content_space = visible_rect_for_tile_priority_;
-  gfx::Rect viewport_rect_for_tile_priority =
-      layer_tree_impl()->ViewportRectForTilePriority();
-  if (visible_rect_in_content_space.IsEmpty() ||
-      layer_tree_impl()->DeviceViewport() != viewport_rect_for_tile_priority) {
-    gfx::Transform view_to_layer(gfx::Transform::kSkipInitialization);
-    if (screen_space_transform().GetInverse(&view_to_layer)) {
-      // Transform from view space to content space.
-      visible_rect_in_content_space =
-          gfx::ToEnclosingRect(MathUtil::ProjectClippedRect(
-              view_to_layer, viewport_rect_for_tile_priority));
-    }
-  }
-  viewport_rect_for_tile_priority_in_content_space_ =
-      visible_rect_in_content_space;
-}
-
-PictureLayerImpl* PictureLayerImpl::GetPendingOrActiveTwinLayer() const {
-  if (!twin_layer_ || !twin_layer_->IsOnActiveOrPendingTree())
-    return nullptr;
-  return twin_layer_;
-}
-
-PictureLayerImpl* PictureLayerImpl::GetRecycledTwinLayer() const {
-  if (!twin_layer_ || twin_layer_->IsOnActiveOrPendingTree())
-    return nullptr;
-  return twin_layer_;
-}
-
-void PictureLayerImpl::UpdateRasterSource(
-    scoped_refptr<RasterSource> raster_source,
-    Region* new_invalidation,
-    const PictureLayerTilingSet* pending_set) {
-  // The bounds and the pile size may differ if the pile wasn't updated (ie.
-  // PictureLayer::Update didn't happen). In that case the pile will be empty.
-  DCHECK_IMPLIES(!raster_source->GetSize().IsEmpty(),
-                 bounds() == raster_source->GetSize())
-      << " bounds " << bounds().ToString() << " pile "
-      << raster_source->GetSize().ToString();
-
-  // The |raster_source_| is initially null, so have to check for that for the
-  // first frame.
-  bool could_have_tilings = raster_source_.get() && CanHaveTilings();
-  raster_source_.swap(raster_source);
-
-  // The |new_invalidation| must be cleared before updating tilings since they
-  // access the invalidation through the PictureLayerTilingClient interface.
-  invalidation_.Clear();
-  invalidation_.Swap(new_invalidation);
-
-  bool can_have_tilings = CanHaveTilings();
-  DCHECK_IMPLIES(
-      pending_set,
-      can_have_tilings == GetPendingOrActiveTwinLayer()->CanHaveTilings());
-
-  // Need to call UpdateTiles again if CanHaveTilings changed.
-  if (could_have_tilings != can_have_tilings)
-    layer_tree_impl()->set_needs_update_draw_properties();
-
-  if (!can_have_tilings) {
-    RemoveAllTilings();
-    return;
-  }
-
-  // We could do this after doing UpdateTiles, which would avoid doing this for
-  // tilings that are going to disappear on the pending tree (if scale changed).
-  // But that would also be more complicated, so we just do it here for now.
-  tilings_->UpdateTilingsToCurrentRasterSource(
-      raster_source_, pending_set, invalidation_, MinimumContentsScale(),
-      MaximumContentsScale());
-}
-
-void PictureLayerImpl::UpdateCanUseLCDTextAfterCommit() {
-  // This function is only allowed to be called after commit, due to it not
-  // being smart about sharing tiles and because otherwise it would cause
-  // flashes by switching out tiles in place that may be currently on screen.
-  DCHECK(layer_tree_impl()->IsSyncTree());
-
-  // Don't allow the LCD text state to change once disabled.
-  if (!RasterSourceUsesLCDText())
-    return;
-  if (can_use_lcd_text() == RasterSourceUsesLCDText())
-    return;
-
-  // Raster sources are considered const, so in order to update the state
-  // a new one must be created and all tiles recreated.
-  scoped_refptr<RasterSource> new_raster_source =
-      raster_source_->CreateCloneWithoutLCDText();
-  // Synthetically invalidate everything.
-  gfx::Rect bounds_rect(bounds());
-  Region invalidation(bounds_rect);
-  UpdateRasterSource(new_raster_source, &invalidation, nullptr);
-  SetUpdateRect(bounds_rect);
-
-  DCHECK(!RasterSourceUsesLCDText());
-}
-
-bool PictureLayerImpl::RasterSourceUsesLCDText() const {
-  return raster_source_ ? raster_source_->CanUseLCDText()
-                        : layer_tree_impl()->settings().can_use_lcd_text;
-}
-
-void PictureLayerImpl::NotifyTileStateChanged(const Tile* tile) {
-  if (layer_tree_impl()->IsActiveTree()) {
-    gfx::RectF layer_damage_rect =
-        gfx::ScaleRect(tile->content_rect(), 1.f / tile->contents_scale());
-    AddDamageRect(layer_damage_rect);
-  }
-}
-
-void PictureLayerImpl::DidBeginTracing() {
-  raster_source_->DidBeginTracing();
-}
-
-void PictureLayerImpl::ReleaseResources() {
-  // Recreate tilings with new settings, since some of those might change when
-  // we release resources.
-  tilings_ = nullptr;
-  ResetRasterScale();
-}
-
-void PictureLayerImpl::RecreateResources() {
-  tilings_ = CreatePictureLayerTilingSet();
-
-  // To avoid an edge case after lost context where the tree is up to date but
-  // the tilings have not been managed, request an update draw properties
-  // to force tilings to get managed.
-  layer_tree_impl()->set_needs_update_draw_properties();
-}
-
-skia::RefPtr<SkPicture> PictureLayerImpl::GetPicture() {
-  return raster_source_->GetFlattenedPicture();
-}
-
-Region PictureLayerImpl::GetInvalidationRegion() {
-  // |invalidation_| gives the invalidation contained in the source frame, but
-  // is not cleared after drawing from the layer. However, update_rect() is
-  // cleared once the invalidation is drawn, which is useful for debugging
-  // visualizations. This method intersects the two to give a more exact
-  // representation of what was invalidated that is cleared after drawing.
-  return IntersectRegions(invalidation_, update_rect());
-}
-
-scoped_refptr<Tile> PictureLayerImpl::CreateTile(
-    float contents_scale,
-    const gfx::Rect& content_rect) {
-  int flags = 0;
-
-  // We don't handle solid color masks, so we shouldn't bother analyzing those.
-  // Otherwise, always analyze to maximize memory savings.
-  if (!is_mask_)
-    flags = Tile::USE_PICTURE_ANALYSIS;
-
-  return layer_tree_impl()->tile_manager()->CreateTile(
-      raster_source_.get(), content_rect.size(), content_rect, contents_scale,
-      id(), layer_tree_impl()->source_frame_number(), flags);
-}
-
-const Region* PictureLayerImpl::GetPendingInvalidation() {
-  if (layer_tree_impl()->IsPendingTree())
-    return &invalidation_;
-  if (layer_tree_impl()->IsRecycleTree())
-    return nullptr;
-  DCHECK(layer_tree_impl()->IsActiveTree());
-  if (PictureLayerImpl* twin_layer = GetPendingOrActiveTwinLayer())
-    return &twin_layer->invalidation_;
-  return nullptr;
-}
-
-const PictureLayerTiling* PictureLayerImpl::GetPendingOrActiveTwinTiling(
-    const PictureLayerTiling* tiling) const {
-  PictureLayerImpl* twin_layer = GetPendingOrActiveTwinLayer();
-  if (!twin_layer)
-    return nullptr;
-  return twin_layer->tilings_->FindTilingWithScale(tiling->contents_scale());
-}
-
-PictureLayerTiling* PictureLayerImpl::GetRecycledTwinTiling(
-    const PictureLayerTiling* tiling) {
-  PictureLayerImpl* recycled_twin = GetRecycledTwinLayer();
-  if (!recycled_twin || !recycled_twin->tilings_)
-    return nullptr;
-  return recycled_twin->tilings_->FindTilingWithScale(tiling->contents_scale());
-}
-
-TilePriority::PriorityBin PictureLayerImpl::GetMaxTilePriorityBin() const {
-  if (!HasValidTilePriorities())
-    return TilePriority::EVENTUALLY;
-  return TilePriority::NOW;
-}
-
-bool PictureLayerImpl::RequiresHighResToDraw() const {
-  return layer_tree_impl()->RequiresHighResToDraw();
-}
-
-gfx::Rect PictureLayerImpl::GetEnclosingRectInTargetSpace() const {
-  return GetScaledEnclosingRectInTargetSpace(MaximumTilingContentsScale());
-}
-
-gfx::Size PictureLayerImpl::CalculateTileSize(
-    const gfx::Size& content_bounds) const {
-  int max_texture_size =
-      layer_tree_impl()->resource_provider()->max_texture_size();
-
-  if (is_mask_) {
-    // Masks are not tiled, so if we can't cover the whole mask with one tile,
-    // we shouldn't have such a tiling at all.
-    DCHECK_LE(content_bounds.width(), max_texture_size);
-    DCHECK_LE(content_bounds.height(), max_texture_size);
-    return content_bounds;
-  }
-
-  int default_tile_width = 0;
-  int default_tile_height = 0;
-  if (layer_tree_impl()->use_gpu_rasterization()) {
-    // For GPU rasterization, we pick an ideal tile size using the viewport
-    // so we don't need any settings. The current approach uses 4 tiles
-    // to cover the viewport vertically.
-    int viewport_width = gpu_raster_max_texture_size_.width();
-    int viewport_height = gpu_raster_max_texture_size_.height();
-    default_tile_width = viewport_width;
-    // Also, increase the height proportionally as the width decreases, and
-    // pad by our border texels to make the tiles exactly match the viewport.
-    int divisor = 4;
-    if (content_bounds.width() <= viewport_width / 2)
-      divisor = 2;
-    if (content_bounds.width() <= viewport_width / 4)
-      divisor = 1;
-    default_tile_height = RoundUp(viewport_height, divisor) / divisor;
-    default_tile_height += 2 * PictureLayerTiling::kBorderTexels;
-    default_tile_height =
-        std::max(default_tile_height, kMinHeightForGpuRasteredTile);
-  } else {
-    // For CPU rasterization we use tile-size settings.
-    const LayerTreeSettings& settings = layer_tree_impl()->settings();
-    int max_untiled_content_width = settings.max_untiled_layer_size.width();
-    int max_untiled_content_height = settings.max_untiled_layer_size.height();
-    default_tile_width = settings.default_tile_size.width();
-    default_tile_height = settings.default_tile_size.height();
-
-    // If the content width is small, increase tile size vertically.
-    // If the content height is small, increase tile size horizontally.
-    // If both are less than the untiled-size, use a single tile.
-    if (content_bounds.width() < default_tile_width)
-      default_tile_height = max_untiled_content_height;
-    if (content_bounds.height() < default_tile_height)
-      default_tile_width = max_untiled_content_width;
-    if (content_bounds.width() < max_untiled_content_width &&
-        content_bounds.height() < max_untiled_content_height) {
-      default_tile_height = max_untiled_content_height;
-      default_tile_width = max_untiled_content_width;
-    }
-  }
-
-  int tile_width = default_tile_width;
-  int tile_height = default_tile_height;
-
-  // Clamp the tile width/height to the content width/height to save space.
-  if (content_bounds.width() < default_tile_width) {
-    tile_width = std::min(tile_width, content_bounds.width());
-    tile_width = RoundUp(tile_width, kTileRoundUp);
-    tile_width = std::min(tile_width, default_tile_width);
-  }
-  if (content_bounds.height() < default_tile_height) {
-    tile_height = std::min(tile_height, content_bounds.height());
-    tile_height = RoundUp(tile_height, kTileRoundUp);
-    tile_height = std::min(tile_height, default_tile_height);
-  }
-
-  // Under no circumstance should we be larger than the max texture size.
-  tile_width = std::min(tile_width, max_texture_size);
-  tile_height = std::min(tile_height, max_texture_size);
-  return gfx::Size(tile_width, tile_height);
-}
-
-void PictureLayerImpl::GetContentsResourceId(
-    ResourceProvider::ResourceId* resource_id,
-    gfx::Size* resource_size) const {
-  // The bounds and the pile size may differ if the pile wasn't updated (ie.
-  // PictureLayer::Update didn't happen). In that case the pile will be empty.
-  DCHECK_IMPLIES(!raster_source_->GetSize().IsEmpty(),
-                 bounds() == raster_source_->GetSize())
-      << " bounds " << bounds().ToString() << " pile "
-      << raster_source_->GetSize().ToString();
-  gfx::Rect content_rect(bounds());
-  PictureLayerTilingSet::CoverageIterator iter(
-      tilings_.get(), 1.f, content_rect, ideal_contents_scale_);
-
-  // Mask resource not ready yet.
-  if (!iter || !*iter) {
-    *resource_id = 0;
-    return;
-  }
-
-  // Masks only supported if they fit on exactly one tile.
-  DCHECK(iter.geometry_rect() == content_rect)
-      << "iter rect " << iter.geometry_rect().ToString() << " content rect "
-      << content_rect.ToString();
-
-  const TileDrawInfo& draw_info = iter->draw_info();
-  if (!draw_info.IsReadyToDraw() ||
-      draw_info.mode() != TileDrawInfo::RESOURCE_MODE) {
-    *resource_id = 0;
-    return;
-  }
-
-  *resource_id = draw_info.resource_id();
-  *resource_size = draw_info.resource_size();
-}
-
-void PictureLayerImpl::SetNearestNeighbor(bool nearest_neighbor) {
-  if (nearest_neighbor_ == nearest_neighbor)
-    return;
-
-  nearest_neighbor_ = nearest_neighbor;
-  NoteLayerPropertyChanged();
-}
-
-PictureLayerTiling* PictureLayerImpl::AddTiling(float contents_scale) {
-  DCHECK(CanHaveTilings());
-  DCHECK_GE(contents_scale, MinimumContentsScale());
-  DCHECK_LE(contents_scale, MaximumContentsScale());
-  DCHECK(raster_source_->HasRecordings());
-  return tilings_->AddTiling(contents_scale, raster_source_);
-}
-
-void PictureLayerImpl::RemoveAllTilings() {
-  tilings_->RemoveAllTilings();
-  // If there are no tilings, then raster scales are no longer meaningful.
-  ResetRasterScale();
-}
-
-void PictureLayerImpl::AddTilingsForRasterScale() {
-  // Reset all resolution enums on tilings, we'll be setting new values in this
-  // function.
-  tilings_->MarkAllTilingsNonIdeal();
-
-  PictureLayerTiling* high_res =
-      tilings_->FindTilingWithScale(raster_contents_scale_);
-  // We always need a high res tiling, so create one if it doesn't exist.
-  if (!high_res)
-    high_res = AddTiling(raster_contents_scale_);
-
-  // Try and find a low res tiling.
-  PictureLayerTiling* low_res = nullptr;
-  if (raster_contents_scale_ == low_res_raster_contents_scale_)
-    low_res = high_res;
-  else
-    low_res = tilings_->FindTilingWithScale(low_res_raster_contents_scale_);
-
-  // Only create new low res tilings when the transform is static.  This
-  // prevents wastefully creating a paired low res tiling for every new high res
-  // tiling during a pinch or a CSS animation.
-  bool can_have_low_res = layer_tree_impl()->create_low_res_tiling();
-  bool needs_low_res = !low_res;
-  bool is_pinching = layer_tree_impl()->PinchGestureActive();
-  bool is_animating = draw_properties().screen_space_transform_is_animating;
-  if (can_have_low_res && needs_low_res && !is_pinching && !is_animating)
-    low_res = AddTiling(low_res_raster_contents_scale_);
-
-  // Set low-res if we have one.
-  if (low_res && low_res != high_res)
-    low_res->set_resolution(LOW_RESOLUTION);
-
-  // Make sure we always have one high-res (even if high == low).
-  high_res->set_resolution(HIGH_RESOLUTION);
-
-  if (layer_tree_impl()->IsPendingTree()) {
-    // On the pending tree, drop any tilings that are non-ideal since we don't
-    // need them to activate anyway.
-    tilings_->RemoveNonIdealTilings();
-  }
-
-  SanityCheckTilingState();
-}
-
-bool PictureLayerImpl::ShouldAdjustRasterScale() const {
-  if (was_screen_space_transform_animating_ !=
-      draw_properties().screen_space_transform_is_animating)
-    return true;
-
-  if (draw_properties().screen_space_transform_is_animating &&
-      raster_contents_scale_ != ideal_contents_scale_ &&
-      ShouldAdjustRasterScaleDuringScaleAnimations())
-    return true;
-
-  bool is_pinching = layer_tree_impl()->PinchGestureActive();
-  if (is_pinching && raster_page_scale_) {
-    // We change our raster scale when it is:
-    // - Higher than ideal (need a lower-res tiling available)
-    // - Too far from ideal (need a higher-res tiling available)
-    float ratio = ideal_page_scale_ / raster_page_scale_;
-    if (raster_page_scale_ > ideal_page_scale_ ||
-        ratio > kMaxScaleRatioDuringPinch)
-      return true;
-  }
-
-  if (!is_pinching) {
-    // When not pinching, match the ideal page scale factor.
-    if (raster_page_scale_ != ideal_page_scale_)
-      return true;
-  }
-
-  // Always match the ideal device scale factor.
-  if (raster_device_scale_ != ideal_device_scale_)
-    return true;
-
-  // When the source scale changes we want to match it, but not when animating
-  // or when we've fixed the scale in place.
-  if (!draw_properties().screen_space_transform_is_animating &&
-      !raster_source_scale_is_fixed_ &&
-      raster_source_scale_ != ideal_source_scale_)
-    return true;
-
-  if (raster_contents_scale_ > MaximumContentsScale())
-    return true;
-  if (raster_contents_scale_ < MinimumContentsScale())
-    return true;
-
-  return false;
-}
-
-void PictureLayerImpl::RecalculateRasterScales() {
-  float old_raster_contents_scale = raster_contents_scale_;
-  float old_raster_page_scale = raster_page_scale_;
-  float old_raster_source_scale = raster_source_scale_;
-
-  raster_device_scale_ = ideal_device_scale_;
-  raster_page_scale_ = ideal_page_scale_;
-  raster_source_scale_ = ideal_source_scale_;
-  raster_contents_scale_ = ideal_contents_scale_;
-
-  // If we're not animating, or leaving an animation, and the
-  // ideal_source_scale_ changes, then things are unpredictable, and we fix
-  // the raster_source_scale_ in place.
-  if (old_raster_source_scale &&
-      !draw_properties().screen_space_transform_is_animating &&
-      !was_screen_space_transform_animating_ &&
-      old_raster_source_scale != ideal_source_scale_)
-    raster_source_scale_is_fixed_ = true;
-
-  // TODO(danakj): Adjust raster source scale closer to ideal source scale at
-  // a throttled rate. Possibly make use of invalidation_.IsEmpty() on pending
-  // tree. This will allow CSS scale changes to get re-rastered at an
-  // appropriate rate. (crbug.com/413636)
-  if (raster_source_scale_is_fixed_) {
-    raster_contents_scale_ /= raster_source_scale_;
-    raster_source_scale_ = 1.f;
-  }
-
-  // During pinch we completely ignore the current ideal scale, and just use
-  // a multiple of the previous scale.
-  bool is_pinching = layer_tree_impl()->PinchGestureActive();
-  if (is_pinching && old_raster_contents_scale) {
-    // See ShouldAdjustRasterScale:
-    // - When zooming out, preemptively create new tiling at lower resolution.
-    // - When zooming in, approximate ideal using multiple of kMaxScaleRatio.
-    bool zooming_out = old_raster_page_scale > ideal_page_scale_;
-    float desired_contents_scale = old_raster_contents_scale;
-    if (zooming_out) {
-      while (desired_contents_scale > ideal_contents_scale_)
-        desired_contents_scale /= kMaxScaleRatioDuringPinch;
-    } else {
-      while (desired_contents_scale < ideal_contents_scale_)
-        desired_contents_scale *= kMaxScaleRatioDuringPinch;
-    }
-    raster_contents_scale_ = tilings_->GetSnappedContentsScale(
-        desired_contents_scale, kSnapToExistingTilingRatio);
-    raster_page_scale_ =
-        raster_contents_scale_ / raster_device_scale_ / raster_source_scale_;
-  }
-
-  // If we're not re-rasterizing during animation, rasterize at the maximum
-  // scale that will occur during the animation, if the maximum scale is
-  // known. However we want to avoid excessive memory use. If the scale is
-  // smaller than what we would choose otherwise, then it's always better off
-  // for us memory-wise. But otherwise, we don't choose a scale at which this
-  // layer's rastered content would become larger than the viewport.
-  if (draw_properties().screen_space_transform_is_animating &&
-      !ShouldAdjustRasterScaleDuringScaleAnimations()) {
-    bool can_raster_at_maximum_scale = false;
-    // TODO(ajuma): If we need to deal with scale-down animations starting right
-    // as a layer gets promoted, then we'd want to have the
-    // |starting_animation_contents_scale| passed in here as a separate draw
-    // property so we could try use that when the max is too large.
-    // See crbug.com/422341.
-    float maximum_scale = draw_properties().maximum_animation_contents_scale;
-    if (maximum_scale) {
-      gfx::Size bounds_at_maximum_scale = gfx::ToCeiledSize(
-          gfx::ScaleSize(raster_source_->GetSize(), maximum_scale));
-      int64 maximum_area = static_cast<int64>(bounds_at_maximum_scale.width()) *
-                           static_cast<int64>(bounds_at_maximum_scale.height());
-      gfx::Size viewport = layer_tree_impl()->device_viewport_size();
-      int64 viewport_area = static_cast<int64>(viewport.width()) *
-                            static_cast<int64>(viewport.height());
-      if (maximum_area <= viewport_area)
-        can_raster_at_maximum_scale = true;
-    }
-    // Use the computed scales for the raster scale directly, do not try to use
-    // the ideal scale here. The current ideal scale may be way too large in the
-    // case of an animation with scale, and will be constantly changing.
-    if (can_raster_at_maximum_scale)
-      raster_contents_scale_ = maximum_scale;
-    else
-      raster_contents_scale_ = 1.f * ideal_page_scale_ * ideal_device_scale_;
-  }
-
-  raster_contents_scale_ =
-      std::max(raster_contents_scale_, MinimumContentsScale());
-  raster_contents_scale_ =
-      std::min(raster_contents_scale_, MaximumContentsScale());
-  DCHECK_GE(raster_contents_scale_, MinimumContentsScale());
-  DCHECK_LE(raster_contents_scale_, MaximumContentsScale());
-
-  // If this layer would create zero or one tiles at this content scale,
-  // don't create a low res tiling.
-  gfx::Size raster_bounds = gfx::ToCeiledSize(
-      gfx::ScaleSize(raster_source_->GetSize(), raster_contents_scale_));
-  gfx::Size tile_size = CalculateTileSize(raster_bounds);
-  bool tile_covers_bounds = tile_size.width() >= raster_bounds.width() &&
-                            tile_size.height() >= raster_bounds.height();
-  if (tile_size.IsEmpty() || tile_covers_bounds) {
-    low_res_raster_contents_scale_ = raster_contents_scale_;
-    return;
-  }
-
-  float low_res_factor =
-      layer_tree_impl()->settings().low_res_contents_scale_factor;
-  low_res_raster_contents_scale_ =
-      std::max(raster_contents_scale_ * low_res_factor, MinimumContentsScale());
-  DCHECK_LE(low_res_raster_contents_scale_, raster_contents_scale_);
-  DCHECK_GE(low_res_raster_contents_scale_, MinimumContentsScale());
-  DCHECK_LE(low_res_raster_contents_scale_, MaximumContentsScale());
-}
-
-void PictureLayerImpl::CleanUpTilingsOnActiveLayer(
-    const std::vector<PictureLayerTiling*>& used_tilings) {
-  DCHECK(layer_tree_impl()->IsActiveTree());
-  if (tilings_->num_tilings() == 0)
-    return;
-
-  float min_acceptable_high_res_scale = std::min(
-      raster_contents_scale_, ideal_contents_scale_);
-  float max_acceptable_high_res_scale = std::max(
-      raster_contents_scale_, ideal_contents_scale_);
-
-  PictureLayerImpl* twin = GetPendingOrActiveTwinLayer();
-  if (twin && twin->CanHaveTilings()) {
-    min_acceptable_high_res_scale = std::min(
-        min_acceptable_high_res_scale,
-        std::min(twin->raster_contents_scale_, twin->ideal_contents_scale_));
-    max_acceptable_high_res_scale = std::max(
-        max_acceptable_high_res_scale,
-        std::max(twin->raster_contents_scale_, twin->ideal_contents_scale_));
-  }
-
-  PictureLayerTilingSet* twin_set = twin ? twin->tilings_.get() : nullptr;
-  PictureLayerImpl* recycled_twin = GetRecycledTwinLayer();
-  PictureLayerTilingSet* recycled_twin_set =
-      recycled_twin ? recycled_twin->tilings_.get() : nullptr;
-
-  tilings_->CleanUpTilings(min_acceptable_high_res_scale,
-                           max_acceptable_high_res_scale, used_tilings,
-                           layer_tree_impl()->create_low_res_tiling(), twin_set,
-                           recycled_twin_set);
-
-  if (recycled_twin_set && recycled_twin_set->num_tilings() == 0)
-    recycled_twin->ResetRasterScale();
-
-  DCHECK_GT(tilings_->num_tilings(), 0u);
-  SanityCheckTilingState();
-}
-
-float PictureLayerImpl::MinimumContentsScale() const {
-  float setting_min = layer_tree_impl()->settings().minimum_contents_scale;
-
-  // If the contents scale is less than 1 / width (also for height),
-  // then it will end up having less than one pixel of content in that
-  // dimension.  Bump the minimum contents scale up in this case to prevent
-  // this from happening.
-  int min_dimension = std::min(raster_source_->GetSize().width(),
-                               raster_source_->GetSize().height());
-  if (!min_dimension)
-    return setting_min;
-
-  return std::max(1.f / min_dimension, setting_min);
-}
-
-float PictureLayerImpl::MaximumContentsScale() const {
-  // Masks can not have tilings that would become larger than the
-  // max_texture_size since they use a single tile for the entire
-  // tiling. Other layers can have tilings of any scale.
-  if (!is_mask_)
-    return std::numeric_limits<float>::max();
-
-  int max_texture_size =
-      layer_tree_impl()->resource_provider()->max_texture_size();
-  float max_scale_width =
-      static_cast<float>(max_texture_size) / bounds().width();
-  float max_scale_height =
-      static_cast<float>(max_texture_size) / bounds().height();
-  float max_scale = std::min(max_scale_width, max_scale_height);
-  // We require that multiplying the layer size by the contents scale and
-  // ceiling produces a value <= |max_texture_size|. Because for large layer
-  // sizes floating point ambiguity may crop up, making the result larger or
-  // smaller than expected, we use a slightly smaller floating point value for
-  // the scale, to help ensure that the resulting content bounds will never end
-  // up larger than |max_texture_size|.
-  return nextafterf(max_scale, 0.f);
-}
-
-void PictureLayerImpl::ResetRasterScale() {
-  raster_page_scale_ = 0.f;
-  raster_device_scale_ = 0.f;
-  raster_source_scale_ = 0.f;
-  raster_contents_scale_ = 0.f;
-  low_res_raster_contents_scale_ = 0.f;
-  raster_source_scale_is_fixed_ = false;
-}
-
-bool PictureLayerImpl::CanHaveTilings() const {
-  if (raster_source_->IsSolidColor())
-    return false;
-  if (!DrawsContent())
-    return false;
-  if (!raster_source_->HasRecordings())
-    return false;
-  // If the |raster_source_| has a recording it should have non-empty bounds.
-  DCHECK(!raster_source_->GetSize().IsEmpty());
-  if (MaximumContentsScale() < MinimumContentsScale())
-    return false;
-  return true;
-}
-
-void PictureLayerImpl::SanityCheckTilingState() const {
-#if DCHECK_IS_ON()
-  // Recycle tree doesn't have any restrictions.
-  if (layer_tree_impl()->IsRecycleTree())
-    return;
-
-  if (!CanHaveTilings()) {
-    DCHECK_EQ(0u, tilings_->num_tilings());
-    return;
-  }
-  if (tilings_->num_tilings() == 0)
-    return;
-
-  // We should only have one high res tiling.
-  DCHECK_EQ(1, tilings_->NumHighResTilings());
-#endif
-}
-
-bool PictureLayerImpl::ShouldAdjustRasterScaleDuringScaleAnimations() const {
-  return layer_tree_impl()->use_gpu_rasterization();
-}
-
-float PictureLayerImpl::MaximumTilingContentsScale() const {
-  float max_contents_scale = tilings_->GetMaximumContentsScale();
-  return std::max(max_contents_scale, MinimumContentsScale());
-}
-
-scoped_ptr<PictureLayerTilingSet>
-PictureLayerImpl::CreatePictureLayerTilingSet() {
-  const LayerTreeSettings& settings = layer_tree_impl()->settings();
-  return PictureLayerTilingSet::Create(
-      this, settings.max_tiles_for_interest_area,
-      layer_tree_impl()->use_gpu_rasterization()
-          ? settings.gpu_rasterization_skewport_target_time_in_seconds
-          : settings.skewport_target_time_in_seconds,
-      settings.skewport_extrapolation_limit_in_content_pixels);
-}
-
-void PictureLayerImpl::UpdateIdealScales() {
-  DCHECK(CanHaveTilings());
-
-  float min_contents_scale = MinimumContentsScale();
-  DCHECK_GT(min_contents_scale, 0.f);
-  float min_page_scale = layer_tree_impl()->min_page_scale_factor();
-  DCHECK_GT(min_page_scale, 0.f);
-  float min_device_scale = 1.f;
-  float min_source_scale =
-      min_contents_scale / min_page_scale / min_device_scale;
-
-  float ideal_page_scale = draw_properties().page_scale_factor;
-  float ideal_device_scale = draw_properties().device_scale_factor;
-  float ideal_source_scale = draw_properties().ideal_contents_scale /
-                             ideal_page_scale / ideal_device_scale;
-  ideal_contents_scale_ =
-      std::max(draw_properties().ideal_contents_scale, min_contents_scale);
-  ideal_page_scale_ = draw_properties().page_scale_factor;
-  ideal_device_scale_ = draw_properties().device_scale_factor;
-  ideal_source_scale_ = std::max(ideal_source_scale, min_source_scale);
-}
-
-void PictureLayerImpl::GetDebugBorderProperties(
-    SkColor* color,
-    float* width) const {
-  *color = DebugColors::TiledContentLayerBorderColor();
-  *width = DebugColors::TiledContentLayerBorderWidth(layer_tree_impl());
-}
-
-void PictureLayerImpl::GetAllTilesAndPrioritiesForTracing(
-    std::map<const Tile*, TilePriority>* tile_map) const {
-  if (!tilings_)
-    return;
-  tilings_->GetAllTilesAndPrioritiesForTracing(tile_map);
-}
-
-void PictureLayerImpl::AsValueInto(
-    base::trace_event::TracedValue* state) const {
-  LayerImpl::AsValueInto(state);
-  state->SetDouble("ideal_contents_scale", ideal_contents_scale_);
-  state->SetDouble("geometry_contents_scale", MaximumTilingContentsScale());
-  state->BeginArray("tilings");
-  tilings_->AsValueInto(state);
-  state->EndArray();
-
-  MathUtil::AddToTracedValue("tile_priority_rect",
-                             viewport_rect_for_tile_priority_in_content_space_,
-                             state);
-  MathUtil::AddToTracedValue("visible_rect", visible_content_rect(), state);
-
-  state->BeginArray("pictures");
-  raster_source_->AsValueInto(state);
-  state->EndArray();
-
-  state->BeginArray("invalidation");
-  invalidation_.AsValueInto(state);
-  state->EndArray();
-
-  state->BeginArray("coverage_tiles");
-  for (PictureLayerTilingSet::CoverageIterator iter(
-           tilings_.get(), 1.f, gfx::Rect(raster_source_->GetSize()),
-           ideal_contents_scale_);
-       iter; ++iter) {
-    state->BeginDictionary();
-
-    MathUtil::AddToTracedValue("geometry_rect", iter.geometry_rect(), state);
-
-    if (*iter)
-      TracedValue::SetIDRef(*iter, state, "tile");
-
-    state->EndDictionary();
-  }
-  state->EndArray();
-}
-
-size_t PictureLayerImpl::GPUMemoryUsageInBytes() const {
-  return tilings_->GPUMemoryUsageInBytes();
-}
-
-void PictureLayerImpl::RunMicroBenchmark(MicroBenchmarkImpl* benchmark) {
-  benchmark->RunOnLayer(this);
-}
-
-WhichTree PictureLayerImpl::GetTree() const {
-  return layer_tree_impl()->IsActiveTree() ? ACTIVE_TREE : PENDING_TREE;
-}
-
-bool PictureLayerImpl::IsOnActiveOrPendingTree() const {
-  return !layer_tree_impl()->IsRecycleTree();
-}
-
-bool PictureLayerImpl::HasValidTilePriorities() const {
-  return IsOnActiveOrPendingTree() && IsDrawnRenderSurfaceLayerListMember();
-}
-
-}  // namespace cc