chromeos: Makes AshTestBase/Helper target mash when appropriate

ash/common/test/ash_test.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 "ash/common/test/ash_test.h"
 
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/system/status_area_widget.h"
 #include "ash/common/test/ash_test_impl.h"
 #include "ash/common/test/test_session_state_delegate.h"
@@ skipping 87 matching lines @@
   return widget;
 }
 
 display::Display AshTest::GetSecondaryDisplay() {
   return test_impl_->GetSecondaryDisplay();
 }
 
 bool AshTest::SetSecondaryDisplayPlacement(
     display::DisplayPlacement::Position position,
     int offset) {
+  if (WmShell::Get()->IsRunningInMash()) {

[msw, 2017/02/19 21:49:20]

Doesn't AshTestImplMus::SetSecondaryDisplayPlacement already do this?

[sky, 2017/02/21 17:06:50]

Done.

+    NOTIMPLEMENTED();
+    return false;
+  }
   return test_impl_->SetSecondaryDisplayPlacement(position, offset);
 }
 
 void AshTest::ConfigureWidgetInitParamsForDisplay(
     WmWindow* window,
     views::Widget::InitParams* init_params) {
   test_impl_->ConfigureWidgetInitParamsForDisplay(window, init_params);
 }
 
 void AshTest::ParentWindowInPrimaryRootWindow(WmWindow* window) {
@@ skipping 12 matching lines @@
 
 void AshTest::SetUp() {
   test_impl_->SetUp();
 }
 
 void AshTest::TearDown() {
   test_impl_->TearDown();
 }
 
 }  // namespace ash