cc: Start using raster/eviction iterators in tile manager

cc/resources/tile.cc

Index: cc/resources/tile.cc
diff --git a/cc/resources/tile.cc b/cc/resources/tile.cc
index d59dc029ccc1ca88b0160f3ded59c245a25d5e40..6708d518e8e447c0fe8c3b2ac2428d93de3e94c5 100644
--- a/cc/resources/tile.cc
+++ b/cc/resources/tile.cc
@@ -44,19 +44,11 @@ Tile::~Tile() {
 }
 
 void Tile::SetPriority(WhichTree tree, const TilePriority& priority) {
-  if (priority == priority_[tree])
-    return;
-
   priority_[tree] = priority;
-  tile_manager_->DidChangeTilePriority(this);
 }
 
 void Tile::MarkRequiredForActivation() {
-  if (priority_[PENDING_TREE].required_for_activation)
-    return;
-
   priority_[PENDING_TREE].required_for_activation = true;
-  tile_manager_->DidChangeTilePriority(this);
 }
 
 scoped_ptr<base::Value> Tile::AsValue() const {