Remove parts of //cc we aren't using

cc/resources/tile_priority.h

-// 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.
-
-#ifndef CC_RESOURCES_TILE_PRIORITY_H_
-#define CC_RESOURCES_TILE_PRIORITY_H_
-
-#include <algorithm>
-#include <limits>
-#include <string>
-
-#include "base/memory/scoped_ptr.h"
-#include "base/trace_event/trace_event_argument.h"
-#include "cc/base/cc_export.h"
-
-namespace base {
-class Value;
-}
-
-namespace cc {
-
-enum WhichTree {
-  // Note: these must be 0 and 1 because we index with them in various places,
-  // e.g. in Tile::priority_.
-  ACTIVE_TREE = 0,
-  PENDING_TREE = 1,
-  LAST_TREE = 1
-  // Be sure to update WhichTreeAsValue when adding new fields.
-};
-scoped_ptr<base::Value> WhichTreeAsValue(WhichTree tree);
-
-enum TileResolution {
-  LOW_RESOLUTION = 0 ,
-  HIGH_RESOLUTION = 1,
-  NON_IDEAL_RESOLUTION = 2,
-};
-std::string TileResolutionToString(TileResolution resolution);
-
-struct CC_EXPORT TilePriority {
-  enum PriorityBin { NOW, SOON, EVENTUALLY };
-
-  TilePriority()
-      : resolution(NON_IDEAL_RESOLUTION),
-        priority_bin(EVENTUALLY),
-        distance_to_visible(std::numeric_limits<float>::infinity()) {}
-
-  TilePriority(TileResolution resolution,
-               PriorityBin bin,
-               float distance_to_visible)
-      : resolution(resolution),
-        priority_bin(bin),
-        distance_to_visible(distance_to_visible) {}
-
-  TilePriority(const TilePriority& active, const TilePriority& pending) {
-    if (active.resolution == HIGH_RESOLUTION ||
-        pending.resolution == HIGH_RESOLUTION)
-      resolution = HIGH_RESOLUTION;
-    else if (active.resolution == LOW_RESOLUTION ||
-             pending.resolution == LOW_RESOLUTION)
-      resolution = LOW_RESOLUTION;
-    else
-      resolution = NON_IDEAL_RESOLUTION;
-
-    if (active.priority_bin < pending.priority_bin) {
-      priority_bin = active.priority_bin;
-      distance_to_visible = active.distance_to_visible;
-    } else if (active.priority_bin > pending.priority_bin) {
-      priority_bin = pending.priority_bin;
-      distance_to_visible = pending.distance_to_visible;
-    } else {
-      priority_bin = active.priority_bin;
-      distance_to_visible =
-          std::min(active.distance_to_visible, pending.distance_to_visible);
-    }
-  }
-
-  void AsValueInto(base::trace_event::TracedValue* dict) const;
-
-  bool operator ==(const TilePriority& other) const {
-    return resolution == other.resolution &&
-           priority_bin == other.priority_bin &&
-           distance_to_visible == other.distance_to_visible;
-  }
-
-  bool operator !=(const TilePriority& other) const {
-    return !(*this == other);
-  }
-
-  bool IsHigherPriorityThan(const TilePriority& other) const {
-    return priority_bin < other.priority_bin ||
-           (priority_bin == other.priority_bin &&
-            distance_to_visible < other.distance_to_visible);
-  }
-
-  TileResolution resolution;
-  PriorityBin priority_bin;
-  float distance_to_visible;
-};
-
-std::string TilePriorityBinToString(TilePriority::PriorityBin bin);
-
-enum TileMemoryLimitPolicy {
-  // Nothing. This mode is used when visible is set to false.
-  ALLOW_NOTHING = 0,
-
-  // You might be made visible, but you're not being interacted with.
-  ALLOW_ABSOLUTE_MINIMUM = 1,  // Tall.
-
-  // You're being interacted with, but we're low on memory.
-  ALLOW_PREPAINT_ONLY = 2,  // Grande.
-
-  // You're the only thing in town. Go crazy.
-  ALLOW_ANYTHING = 3  // Venti.
-};
-std::string TileMemoryLimitPolicyToString(TileMemoryLimitPolicy policy);
-
-enum TreePriority {
-  SAME_PRIORITY_FOR_BOTH_TREES,
-  SMOOTHNESS_TAKES_PRIORITY,
-  NEW_CONTENT_TAKES_PRIORITY,
-  LAST_TREE_PRIORITY = NEW_CONTENT_TAKES_PRIORITY
-  // Be sure to update TreePriorityAsValue when adding new fields.
-};
-std::string TreePriorityToString(TreePriority prio);
-
-class GlobalStateThatImpactsTilePriority {
- public:
-  GlobalStateThatImpactsTilePriority()
-      : memory_limit_policy(ALLOW_NOTHING),
-        soft_memory_limit_in_bytes(0),
-        hard_memory_limit_in_bytes(0),
-        num_resources_limit(0),
-        tree_priority(SAME_PRIORITY_FOR_BOTH_TREES) {}
-
-  TileMemoryLimitPolicy memory_limit_policy;
-
-  size_t soft_memory_limit_in_bytes;
-  size_t hard_memory_limit_in_bytes;
-  size_t num_resources_limit;
-
-  TreePriority tree_priority;
-
-  bool operator==(const GlobalStateThatImpactsTilePriority& other) const {
-    return memory_limit_policy == other.memory_limit_policy &&
-           soft_memory_limit_in_bytes == other.soft_memory_limit_in_bytes &&
-           hard_memory_limit_in_bytes == other.hard_memory_limit_in_bytes &&
-           num_resources_limit == other.num_resources_limit &&
-           tree_priority == other.tree_priority;
-  }
-  bool operator!=(const GlobalStateThatImpactsTilePriority& other) const {
-    return !(*this == other);
-  }
-
-  void AsValueInto(base::trace_event::TracedValue* dict) const;
-};
-
-}  // namespace cc
-
-#endif  // CC_RESOURCES_TILE_PRIORITY_H_