cc: Start using raster/eviction iterators.

cc/test/test_tile_priorities.h

 // Copyright 2013 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_TEST_TEST_TILE_PRIORITIES_H_
 #define CC_TEST_TEST_TILE_PRIORITIES_H_
 
 #include "cc/resources/tile_priority.h"
 
 namespace cc {
 
 class TilePriorityForSoonBin : public TilePriority {
  public:
   TilePriorityForSoonBin();
 };
 
 class TilePriorityForEventualBin : public TilePriority {
  public:
   TilePriorityForEventualBin();
 };
 
 class TilePriorityForNowBin : public TilePriority {
  public:
   TilePriorityForNowBin();
 };
 
-class TilePriorityRequiredForActivation : public TilePriority {
- public:
-  TilePriorityRequiredForActivation();
-};
-
 class TilePriorityLowRes : public TilePriority {
  public:
   TilePriorityLowRes();
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_TEST_TILE_PRIORITIES_H_