cc: Use multiple PrepareTiles approaches

cc/trees/layer_tree_host_impl_unittest.cc

Index: cc/trees/layer_tree_host_impl_unittest.cc
diff --git a/cc/trees/layer_tree_host_impl_unittest.cc b/cc/trees/layer_tree_host_impl_unittest.cc
index cc239da773142f736fc473b1ea41ef43fec1eb96..bc17192d8182afe2a5344d794c84ccfed32c9857 100644
--- a/cc/trees/layer_tree_host_impl_unittest.cc
+++ b/cc/trees/layer_tree_host_impl_unittest.cc
@@ -142,7 +142,7 @@ class LayerTreeHostImplTest : public testing::Test,
     did_request_redraw_ = true;
   }
   void SetNeedsAnimateOnImplThread() override { did_request_animate_ = true; }
-  void SetNeedsPrepareTilesOnImplThread() override {
+  void SetNeedsPrepareTilesOnImplThread(bool for_commit) override {
     did_request_prepare_tiles_ = true;
   }
   void SetNeedsCommitOnImplThread() override { did_request_commit_ = true; }
@@ -163,7 +163,6 @@ class LayerTreeHostImplTest : public testing::Test,
     requested_animation_delay_ = delay;
   }
   void DidActivateSyncTree() override {}
-  void DidPrepareTiles() override {}
   void DidCompletePageScaleAnimationOnImplThread() override {
     did_complete_page_scale_animation_ = true;
   }