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

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/gpu/render_widget_compositor.h"
 
 #include <limits>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 276 matching lines @@
       compositor_deps_->GetGpuRasterizationMSAASampleCount();
   settings.gpu_rasterization_forced =
       compositor_deps_->IsGpuRasterizationForced();
   settings.gpu_rasterization_enabled =
       compositor_deps_->IsGpuRasterizationEnabled();
 
   settings.can_use_lcd_text = compositor_deps_->IsLcdTextEnabled();
   settings.use_distance_field_text =
       compositor_deps_->IsDistanceFieldTextEnabled();
   settings.use_zero_copy = compositor_deps_->IsZeroCopyEnabled();
-  settings.use_one_copy = compositor_deps_->IsOneCopyEnabled();
   settings.enable_elastic_overscroll =
       compositor_deps_->IsElasticOverscrollEnabled();
   settings.use_image_texture_target = compositor_deps_->GetImageTextureTarget();
   settings.gather_pixel_refs = compositor_deps_->IsGatherPixelRefsEnabled();
 
   if (cmd->HasSwitch(cc::switches::kTopControlsShowThreshold)) {
       std::string top_threshold_str =
           cmd->GetSwitchValueASCII(cc::switches::kTopControlsShowThreshold);
       double show_threshold;
       if (base::StringToDouble(top_threshold_str, &show_threshold) &&
@@ skipping 729 matching lines @@
     return;
   provider->ContextGL()->RateLimitOffscreenContextCHROMIUM();
 }
 
 void RenderWidgetCompositor::SetSurfaceIdNamespace(
     uint32_t surface_id_namespace) {
   layer_tree_host_->set_surface_id_namespace(surface_id_namespace);
 }
 
 }  // namespace content