cc: Fix BytesPerPixel issue and refactor.

cc/tiles/tile.cc

Index: cc/tiles/tile.cc
diff --git a/cc/tiles/tile.cc b/cc/tiles/tile.cc
index 6052e5e0457e0f41cca41eab900166237f0bd6ee..806cf320c75691eb0ab833fe82d0b2df0b774c4e 100644
--- a/cc/tiles/tile.cc
+++ b/cc/tiles/tile.cc
@@ -71,7 +71,7 @@ size_t Tile::GPUMemoryUsageInBytes() const {
   if (draw_info_.resource_) {
     // We can use UncheckedSizeInBytes, since the tile size is determined by the
     // compositor.
-    return Resource::UncheckedMemorySizeBytes(draw_info_.resource_->size(),
+    return ResourceUtil::UncheckedSizeInBytes(draw_info_.resource_->size(),
                                               draw_info_.resource_->format());
   }
   return 0;