blimp: Enable the updated compositing path by default.

blimp/client/core/context/blimp_client_context_impl.cc

 // 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.
 
 #include "blimp/client/core/context/blimp_client_context_impl.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 31 matching lines @@
 
 namespace {
 
 const char kDefaultAssignerUrl[] =
     "https://blimp-pa.googleapis.com/v1/assignment";
 
 void DropConnectionOnIOThread(ClientNetworkComponents* net_components) {
   net_components->GetBrowserConnectionHandler()->DropCurrentConnection();
 }
 
+void AppendDefaultCommandLineFlags(base::CommandLine* command_line) {
+  // Enables the updated compositing path before any tabs are created.
+  command_line->AppendSwitch(switches::kEnableUpdatedCompositingPath);
+}
+
 }  // namespace
 
 // This function is declared in //blimp/client/public/blimp_client_context.h,
 // and either this function or the one in
 // //blimp/client/core/dummy_blimp_client_context.cc should be linked in to
 // any binary using BlimpClientContext::Create.
 // static
 BlimpClientContext* BlimpClientContext::Create(
     scoped_refptr<base::SingleThreadTaskRunner> io_thread_task_runner,
     scoped_refptr<base::SingleThreadTaskRunner> file_thread_task_runner,
@@ skipping 70 matching lines @@
   settings_feature_->PushSettings();
 
   connection_status_.AddObserver(this);
 
   // Initialize must only be posted after the features have been
   // registered.
   io_thread_task_runner_->PostTask(
       FROM_HERE, base::Bind(&ClientNetworkComponents::Initialize,
                             base::Unretained(net_components_.get())));
 
+  AppendDefaultCommandLineFlags(base::CommandLine::ForCurrentProcess());
+
   UMA_HISTOGRAM_BOOLEAN("Blimp.Supported", true);
 }
 
 BlimpClientContextImpl::~BlimpClientContextImpl() {
   io_thread_task_runner_->DeleteSoon(FROM_HERE, net_components_.release());
   connection_status_.RemoveObserver(this);
 }
 
 void BlimpClientContextImpl::SetDelegate(BlimpClientContextDelegate* delegate) {
   DCHECK(!delegate_ || !delegate);
@@ skipping 123 matching lines @@
     if (result >= 0) {
       delegate_->OnEngineDisconnected(result);
     } else {
       delegate_->OnNetworkDisconnected(result);
     }
   }
 }
 
 }  // namespace client
 }  // namespace blimp