Makes PlatformEventSource creation in Env conditional

content/browser/renderer_host/render_widget_host_unittest.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 "base/basictypes.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/shared_memory.h"
 #include "base/timer/timer.h"
@@ skipping 589 matching lines @@
   virtual void SetUp() {
     CommandLine* command_line = CommandLine::ForCurrentProcess();
     command_line->AppendSwitch(switches::kValidateInputEventStream);
 
     browser_context_.reset(new TestBrowserContext());
     delegate_.reset(new MockRenderWidgetHostDelegate());
     process_ = new RenderWidgetHostProcess(browser_context_.get());
 #if defined(USE_AURA)
     ImageTransportFactory::InitializeForUnitTests(
         scoped_ptr<ui::ContextFactory>(new ui::InProcessContextFactory));
-    aura::Env::CreateInstance();
+    aura::Env::CreateInstance(true);
     screen_.reset(aura::TestScreen::Create());
     gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, screen_.get());
 #endif
     host_.reset(
         new MockRenderWidgetHost(delegate_.get(), process_, MSG_ROUTING_NONE));
     view_.reset(new TestView(host_.get()));
     host_->SetView(view_.get());
     host_->Init();
   }
   virtual void TearDown() {
@@ skipping 2054 matching lines @@
 
   // Tests RWHI::ForwardTouchEventWithLatencyInfo().
   PressTouchPoint(0, 1);
   SendTouchEvent();
   CheckLatencyInfoComponentInMessage(
       process_, GetLatencyComponentId(), WebInputEvent::TouchStart);
   SendInputEventACK(WebInputEvent::TouchStart, INPUT_EVENT_ACK_STATE_CONSUMED);
 }
 
 }  // namespace content