cc: one copy is default as well as final fallback.

cc/trees/layer_tree_host_unittest_context.cc

Index: cc/trees/layer_tree_host_unittest_context.cc
diff --git a/cc/trees/layer_tree_host_unittest_context.cc b/cc/trees/layer_tree_host_unittest_context.cc
index b5799bc4ca33706f63ace563d51724a896efaba3..dc22a3c409de5726e9899fffaf37a8e4fa4d6ee5 100644
--- a/cc/trees/layer_tree_host_unittest_context.cc
+++ b/cc/trees/layer_tree_host_unittest_context.cc
@@ -391,7 +391,6 @@ class MultipleCompositeDoesNotCreateOutputSurface
   void InitializeSettings(LayerTreeSettings* settings) override {
     settings->single_thread_proxy_scheduler = false;
     settings->use_zero_copy = true;
-    settings->use_one_copy = false;
   }
 
   void RequestNewOutputSurface() override {
@@ -431,7 +430,6 @@ class FailedCreateDoesNotCreateExtraOutputSurface
   void InitializeSettings(LayerTreeSettings* settings) override {
     settings->single_thread_proxy_scheduler = false;
     settings->use_zero_copy = true;
-    settings->use_one_copy = false;
   }
 
   void RequestNewOutputSurface() override {
@@ -485,7 +483,6 @@ class LayerTreeHostContextTestCommitAfterDelayedOutputSurface
   void InitializeSettings(LayerTreeSettings* settings) override {
     settings->single_thread_proxy_scheduler = false;
     settings->use_zero_copy = true;
-    settings->use_one_copy = false;
   }
 
   void RequestNewOutputSurface() override {
@@ -528,7 +525,6 @@ class LayerTreeHostContextTestAvoidUnnecessaryComposite
   void InitializeSettings(LayerTreeSettings* settings) override {
     settings->single_thread_proxy_scheduler = false;
     settings->use_zero_copy = true;
-    settings->use_one_copy = false;
   }
 
   void RequestNewOutputSurface() override {