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

content/browser/renderer_host/render_process_host_impl.cc

 // Copyright 2012 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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 1107 matching lines @@
   if (IsGpuRasterizationEnabled())
     command_line->AppendSwitch(switches::kEnableGpuRasterization);
 
   int msaa_sample_count = GpuRasterizationMSAASampleCount();
   if (msaa_sample_count > 0) {
     command_line->AppendSwitchASCII(
         switches::kGpuRasterizationMSAASampleCount,
         base::IntToString(msaa_sample_count));
   }
 
-  DCHECK_IMPLIES(IsZeroCopyUploadEnabled(), !IsOneCopyUploadEnabled());
-  DCHECK_IMPLIES(IsOneCopyUploadEnabled(), !IsZeroCopyUploadEnabled());
   if (IsZeroCopyUploadEnabled())
     command_line->AppendSwitch(switches::kEnableZeroCopy);
-  if (!IsOneCopyUploadEnabled())
-    command_line->AppendSwitch(switches::kDisableOneCopy);
 
   if (IsForceGpuRasterizationEnabled())
     command_line->AppendSwitch(switches::kForceGpuRasterization);
 
   command_line->AppendSwitchASCII(
       switches::kContentImageTextureTarget,
       base::UintToString(
           // TODO(reveman): We currently assume that the compositor will use
           // BGRA_8888 if it's able to, and RGBA_8888 otherwise. Since we don't
           // know what it will use we hardcode BGRA_8888 here for now. We should
@@ skipping 1366 matching lines @@
 void RenderProcessHostImpl::GetAudioOutputControllers(
     const GetAudioOutputControllersCallback& callback) const {
   audio_renderer_host()->GetOutputControllers(callback);
 }
 
 BluetoothDispatcherHost* RenderProcessHostImpl::GetBluetoothDispatcherHost() {
   return bluetooth_dispatcher_host_.get();
 }
 
 }  // namespace content