Explicit initialization of aura::Env for browser shell.

ui/views/bubble/bubble_delegate_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/run_loop.h"
 #include "ui/base/hit_test.h"
 #include "ui/views/bubble/bubble_delegate.h"
 #include "ui/views/bubble/bubble_frame_view.h"
 #include "ui/views/test/test_widget_observer.h"
 #include "ui/views/test/views_test_base.h"
@@ skipping 177 matching lines @@
 }
 
 // This class provides functionality to verify that the BubbleView shows up
 // when we call BubbleDelegateView::StartFade(true) and is destroyed when we
 // call BubbleDelegateView::StartFade(false).
 class BubbleWidgetClosingTest : public BubbleDelegateTest,
                                 public views::WidgetObserver {
  public:
   BubbleWidgetClosingTest() : bubble_destroyed_(false) {
 #if defined(USE_AURA)
+    aura::Env::CreateInstance();
     loop_.set_dispatcher(aura::Env::GetInstance()->GetDispatcher());
 #endif
   }
 
   virtual ~BubbleWidgetClosingTest() {}
 
   void Observe(views::Widget* widget) {
     widget->AddObserver(this);
   }
 
@@ skipping 31 matching lines @@
             bubble_widget->GetFocusManager()->GetFocusedView());
 
   Observe(bubble_widget);
 
   bubble_delegate->StartFade(false);
   RunNestedLoop();
   EXPECT_TRUE(bubble_destroyed());
 }
 
 }  // namespace views