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

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index a4a69750c51f0fc303897251e82d1d9a4c487398..ca7481ddb2a9d598fcfc297429652bbe256d7aef 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -707,7 +707,6 @@ void RenderThreadImpl::Init() {
   cc_blink::WebLayerImpl::SetLayerSettings(layer_settings);
 
   is_zero_copy_enabled_ = command_line.HasSwitch(switches::kEnableZeroCopy);
-  is_one_copy_enabled_ = !command_line.HasSwitch(switches::kDisableOneCopy);
 
 #if defined(OS_MACOSX) && !defined(OS_IOS)
   is_elastic_overscroll_enabled_ = base::mac::IsOSLionOrLater();
@@ -1522,10 +1521,6 @@ bool RenderThreadImpl::IsZeroCopyEnabled() {
   return is_zero_copy_enabled_;
 }
 
-bool RenderThreadImpl::IsOneCopyEnabled() {
-  return is_one_copy_enabled_;
-}
-
 bool RenderThreadImpl::IsElasticOverscrollEnabled() {
   return is_elastic_overscroll_enabled_;
 }