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 5c7488cbff7dbb3b31aa5095593a3c482b7e55ec..36136e0547ef7a619d4ec4ddb7b8d0d3cc35752a 100644
--- a/cc/trees/layer_tree_host_impl_unittest.cc
+++ b/cc/trees/layer_tree_host_impl_unittest.cc
@@ -141,7 +141,7 @@ 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; }
@@ -162,7 +162,6 @@ class LayerTreeHostImplTest : public testing::Test,
     requested_animation_delay_ = delay;
   }
   void DidActivateSyncTree() override {}
-  void DidPrepareTiles() override {}
   void DidCompletePageScaleAnimationOnImplThread() override {
     did_complete_page_scale_animation_ = true;
   }