cc: Change tile manager perftest to use layers.

cc/resources/tile_manager.cc

Index: cc/resources/tile_manager.cc
diff --git a/cc/resources/tile_manager.cc b/cc/resources/tile_manager.cc
index 1c04d077f106ecabe69a71cd6b4d5482b4f5aceb..9868a4e180553b16e62b9fd35b9d24420532580a 100644
--- a/cc/resources/tile_manager.cc
+++ b/cc/resources/tile_manager.cc
@@ -17,7 +17,6 @@
 #include "cc/debug/traced_value.h"
 #include "cc/layers/picture_layer_impl.h"
 #include "cc/resources/raster_worker_pool.h"
-#include "cc/resources/rasterizer_delegate.h"
 #include "cc/resources/tile.h"
 #include "skia/ext/paint_simplifier.h"
 #include "third_party/skia/include/core/SkBitmap.h"
@@ -1616,4 +1615,11 @@ bool TileManager::EvictionTileIterator::EvictionOrderComparator::operator()(
   return a_priority.IsHigherPriorityThan(b_priority);
 }
 
+void TileManager::SetRasterizersForTesting(Rasterizer* rasterizer,
+                                           Rasterizer* gpu_rasterizer) {
+  Rasterizer* rasterizers[2] = {rasterizer, gpu_rasterizer};
+  rasterizer_delegate_ =
+      RasterizerDelegate::Create(this, rasterizers, arraysize(rasterizers));
+}
+
 }  // namespace cc