cc: Move raster_source from Tile to PrioritizedTile

cc/resources/tile.cc

Index: cc/resources/tile.cc
diff --git a/cc/resources/tile.cc b/cc/resources/tile.cc
index 2faa6e48b2e4c2c4d4be306394b1c89170dcd1d7..e3588250479835c931ca848f66302d27c0506b0a 100644
--- a/cc/resources/tile.cc
+++ b/cc/resources/tile.cc
@@ -36,7 +36,6 @@ Tile::Tile(TileManager* tile_manager,
       required_for_draw_(false),
       id_(s_next_id_++),
       scheduled_priority_(0) {
-  set_raster_source(raster_source);
 }
 
 Tile::~Tile() {
@@ -45,11 +44,11 @@ Tile::~Tile() {
       "cc::Tile", this);
 }
 
-void Tile::AsValueWithPriorityInto(const TilePriority& priority,
+void Tile::AsValueWithPriorityInto(const PrioritizedTile& prioritized_tile,
                                    base::trace_event::TracedValue* res) const {
   TracedValue::MakeDictIntoImplicitSnapshotWithCategory(
       TRACE_DISABLED_BY_DEFAULT("cc.debug"), res, "cc::Tile", this);
-  TracedValue::SetIDRef(raster_source_.get(), res, "picture_pile");
+  TracedValue::SetIDRef(prioritized_tile.raster_source(), res, "picture_pile");
   res->SetDouble("contents_scale", contents_scale_);
 
   MathUtil::AddToTracedValue("content_rect", content_rect_, res);
@@ -57,7 +56,7 @@ void Tile::AsValueWithPriorityInto(const TilePriority& priority,
   res->SetInteger("layer_id", layer_id_);
 
   res->BeginDictionary("combined_priority");
-  priority.AsValueInto(res);
+  prioritized_tile.priority().AsValueInto(res);
   res->EndDictionary();
 
   res->BeginDictionary("draw_info");
@@ -66,7 +65,8 @@ void Tile::AsValueWithPriorityInto(const TilePriority& priority,
 
   res->SetBoolean("has_resource", HasResource());
   res->SetBoolean("is_using_gpu_memory", HasResource() || HasRasterTask());
-  res->SetString("resolution", TileResolutionToString(priority.resolution));
+  res->SetString("resolution", TileResolutionToString(
+                                   prioritized_tile.priority().resolution));
 
   res->SetInteger("scheduled_priority", scheduled_priority_);