Make --enable-slimming-paint-v2 enable --enable-layer-lists

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 1458 matching lines @@
     }
   }
   command_line->AppendSwitchASCII(
       switches::kContentImageTextureTarget,
       cc::BufferToTextureTargetMapToString(image_targets));
 
   // Appending disable-gpu-feature switches due to software rendering list.
   GpuDataManagerImpl* gpu_data_manager = GpuDataManagerImpl::GetInstance();
   DCHECK(gpu_data_manager);
   gpu_data_manager->AppendRendererCommandLine(command_line);
+
+  // Slimming Paint v2 implies layer lists in the renderer.
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableSlimmingPaintV2))

[no sievers, 2016/08/30 20:55:01]

nit: curly braces since it's multiline

[pdr., 2016/08/30 22:31:05]

Good idea, done.

+    command_line->AppendSwitch(cc::switches::kEnableLayerLists);
 }
 
 void RenderProcessHostImpl::AppendRendererCommandLine(
     base::CommandLine* command_line) const {
   // Pass the process type first, so it shows first in process listings.
   command_line->AppendSwitchASCII(switches::kProcessType,
                                   switches::kRendererProcess);
 
 #if defined(OS_WIN)
   command_line->AppendArg(switches::kPrefetchArgumentRenderer);
@@ skipping 1440 matching lines @@
   LOG(ERROR) << "Terminating render process for bad Mojo message: " << error;
 
   // The ReceivedBadMessage call below will trigger a DumpWithoutCrashing. Alias
   // enough information here so that we can determine what the bad message was.
   base::debug::Alias(&error);
   bad_message::ReceivedBadMessage(process.get(),
                                   bad_message::RPH_MOJO_PROCESS_ERROR);
 }
 
 }  // namespace content