Fix crash of OmniboxViewViewsTest.SelectAllOnClick on Linux Aura

chrome/test/base/view_event_test_base.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 "chrome/test/base/view_event_test_base.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 12 matching lines @@
 #include "ash/shell.h"
 #include "ash/test/test_session_state_delegate.h"
 #include "ash/test/test_shell_delegate.h"
 #endif
 
 #if defined(USE_AURA)
 #include "ui/aura/client/event_client.h"
 #include "ui/aura/env.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/test/aura_test_helper.h"
+#include "ui/aura/window_tree_host.h"
 #include "ui/views/corewm/wm_state.h"
 #endif
 
 #if defined(OS_CHROMEOS)
 #include "chromeos/audio/cras_audio_handler.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/network/network_handler.h"
 #endif
 
 namespace {
@@ skipping 76 matching lines @@
   chromeos::DBusThreadManager::InitializeWithStub();
   chromeos::CrasAudioHandler::InitializeForTesting();
   chromeos::NetworkHandler::Initialize();
 #endif  // OS_CHROMEOS
   ash::test::TestShellDelegate* shell_delegate =
       new ash::test::TestShellDelegate();
   ash::Shell::CreateInstance(shell_delegate);
   shell_delegate->test_session_state_delegate()
       ->SetActiveUserSessionStarted(true);
   context = ash::Shell::GetPrimaryRootWindow();
+  context->GetDispatcher()->host()->Show();
 #endif  // !OS_WIN
   aura::Env::CreateInstance();
 #elif defined(USE_AURA)
   // Instead of using the ash shell, use an AuraTestHelper to create and manage
   // the test screen.
   aura_test_helper_.reset(
       new aura::test::AuraTestHelper(base::MessageLoopForUI::current()));
   bool allow_test_contexts = true;
   aura_test_helper_->SetUp(allow_test_contexts);
   context = aura_test_helper_->root_window();
@@ skipping 97 matching lines @@
   dnd_thread_.reset(NULL);
 }
 
 void ViewEventTestBase::RunTestMethod(const base::Closure& task) {
   StopBackgroundThread();
 
   task.Run();
   if (HasFatalFailure())
     Done();
 }