[views-mus] Prevent creating a native OzonePlatform in mus tests.

ui/aura/env.cc

 // Copyright (c) 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.
 
 #include "ui/aura/env.h"
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/memory/ptr_util.h"
 #include "base/threading/thread_local.h"
@@ skipping 14 matching lines @@
 #endif
 
 namespace aura {
 
 namespace {
 
 // Env is thread local so that aura may be used on multiple threads.
 base::LazyInstance<base::ThreadLocalPointer<Env>>::Leaky lazy_tls_ptr =
     LAZY_INSTANCE_INITIALIZER;
 
-// Returns true if running inside of mus. Checks for mojo specific flag.
-bool RunningInsideMus() {
-  return base::CommandLine::ForCurrentProcess()->HasSwitch(
-      "primordial-pipe-token");
-}
-
 }  // namespace
 
 ////////////////////////////////////////////////////////////////////////////////
 // Env, public:
 
 Env::~Env() {
   if (is_os_exchange_data_provider_factory_)
     ui::OSExchangeDataProviderFactory::SetFactory(nullptr);
 
   for (EnvObserver& observer : observers_)
@@ skipping 93 matching lines @@
       is_touch_down_(false),
       get_last_mouse_location_from_mus_(mode_ == Mode::MUS),
       input_state_lookup_(InputStateLookup::Create()),
       context_factory_(nullptr),
       context_factory_private_(nullptr) {
   DCHECK(lazy_tls_ptr.Pointer()->Get() == NULL);
   lazy_tls_ptr.Pointer()->Set(this);
 }
 
 void Env::Init() {
-  if (RunningInsideMus()) {
+  if (mode_ == Mode::MUS) {
     EnableMusOSExchangeDataProvider();
     return;
   }
 
 #if defined(USE_OZONE)
   // The ozone platform can provide its own event source. So initialize the
   // platform before creating the default event source. If running inside mus
   // let the mus process initialize ozone instead.
   ui::OzonePlatform::InitializeForUI();
 #endif
@@ skipping 41 matching lines @@
 ui::EventTargeter* Env::GetEventTargeter() {
   NOTREACHED();
   return NULL;
 }
 
 std::unique_ptr<ui::OSExchangeData::Provider> Env::BuildProvider() {
   return base::MakeUnique<aura::OSExchangeDataProviderMus>();
 }
 
 }  // namespace aura