blimp: Add mode to use the updated compositing path on the client.

blimp/client/core/switches/blimp_client_switches.h

 // Copyright 2016 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.
 
 // Defines all the command-line switches used by //blimp/client/core.
 
 #ifndef BLIMP_CLIENT_CORE_SWITCHES_BLIMP_CLIENT_SWITCHES_H_
 #define BLIMP_CLIENT_CORE_SWITCHES_BLIMP_CLIENT_SWITCHES_H_
 
 namespace blimp {
@@ skipping 15 matching lines @@
 extern const char kEnginePort[];
 
 // Specifies the transport used to communicate with the engine.
 // Can be "tcp" or "ssl".
 // Must be used in conjunction with --engine-ip and --engine-port.
 extern const char kEngineTransport[];
 
 // Enables downloading the complete page from the engine.
 extern const char kDownloadWholeDocument[];
 
+// Enables the updated compositing path, which uses a threaded
+// LayerTreeHostInProcess for the BlimpCompositor.
+extern const char kEnableUpdatedCompositingPath[];
+
 }  // namespace switches
 }  // namespace blimp
 
 #endif  // BLIMP_CLIENT_CORE_SWITCHES_BLIMP_CLIENT_SWITCHES_H_