cc: Separate the priority from the tile and put in new PrioritizedTile

cc/layers/picture_layer_impl_perftest.cc

 // Copyright 2014 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 "base/thread_task_runner_handle.h"
 #include "cc/debug/lap_timer.h"
 #include "cc/resources/tiling_set_raster_queue_all.h"
 #include "cc/test/fake_impl_proxy.h"
@@ skipping 67 matching lines @@
     bool update_lcd_text = false;
     host_impl_.pending_tree()->UpdateDrawProperties(update_lcd_text);
 
     timer_.Reset();
     do {
       int count = num_tiles;
       scoped_ptr<TilingSetRasterQueueAll> queue(new TilingSetRasterQueueAll(
           pending_layer_->picture_layer_tiling_set(), false));
       while (count--) {
         ASSERT_TRUE(!queue->IsEmpty()) << "count: " << count;
-        ASSERT_TRUE(queue->Top() != nullptr) << "count: " << count;
+        ASSERT_TRUE(queue->Top().tile() != nullptr) << "count: " << count;
         queue->Pop();
       }
       timer_.NextLap();
     } while (!timer_.HasTimeLimitExpired());
 
     perf_test::PrintResult("tiling_set_raster_queue_construct_and_iterate", "",
                            test_name, timer_.LapsPerSecond(), "runs/s", true);
   }
 
   void RunRasterQueueConstructTest(const std::string& test_name,
@@ skipping 23 matching lines @@
     bool update_lcd_text = false;
     host_impl_.pending_tree()->UpdateDrawProperties(update_lcd_text);
 
     timer_.Reset();
     do {
       int count = num_tiles;
       scoped_ptr<TilingSetEvictionQueue> queue(new TilingSetEvictionQueue(
           pending_layer_->picture_layer_tiling_set()));
       while (count--) {
         ASSERT_TRUE(!queue->IsEmpty()) << "count: " << count;
-        ASSERT_TRUE(queue->Top() != nullptr) << "count: " << count;
+        ASSERT_TRUE(queue->Top().tile() != nullptr) << "count: " << count;
         queue->Pop();
       }
       timer_.NextLap();
     } while (!timer_.HasTimeLimitExpired());
 
     perf_test::PrintResult("tiling_set_eviction_queue_construct_and_iterate",
                            "", test_name, timer_.LapsPerSecond(), "runs/s",
                            true);
   }
 
@@ skipping 101 matching lines @@
   ASSERT_TRUE(host_impl_.tile_manager() != nullptr);
   host_impl_.tile_manager()->InitializeTilesWithResourcesForTesting(all_tiles);
 
   RunEvictionQueueConstructTest("0_0_100x100", gfx::Rect(0, 0, 100, 100));
   RunEvictionQueueConstructTest("5000_0_100x100", gfx::Rect(5000, 0, 100, 100));
   RunEvictionQueueConstructTest("9999_0_100x100", gfx::Rect(9999, 0, 100, 100));
 }
 
 }  // namespace
 }  // namespace cc