Revert of Moves ash content specific tests into ash_content_unittests

ash/test/ash_test_environment_content.cc

Index: ash/test/ash_test_environment_content.cc
diff --git a/ash/test/ash_test_environment_content.cc b/ash/test/ash_test_environment_content.cc
deleted file mode 100644
index 0e5123730ab39b6f5872b57c62ce53e0675b75ed..0000000000000000000000000000000000000000
--- a/ash/test/ash_test_environment_content.cc
+++ /dev/null
@@ -1,70 +0,0 @@
-// 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/test/ash_test_environment_content.h"
-
-#include "ash/test/ash_test_views_delegate.h"
-#include "ash/test/content/test_shell_content_state.h"
-#include "base/memory/ptr_util.h"
-#include "content/public/browser/browser_thread.h"
-#include "content/public/test/test_browser_thread_bundle.h"
-#include "content/public/test/web_contents_tester.h"
-
-namespace ash {
-namespace test {
-namespace {
-
-class AshTestViewsDelegateContent : public AshTestViewsDelegate {
- public:
-  AshTestViewsDelegateContent() {}
-  ~AshTestViewsDelegateContent() override {}
-
-  // AshTestViewsDelegate:
-  content::WebContents* CreateWebContents(
-      content::BrowserContext* browser_context,
-      content::SiteInstance* site_instance) override {
-    return content::WebContentsTester::CreateTestWebContents(browser_context,
-                                                             site_instance);
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(AshTestViewsDelegateContent);
-};
-
-}  // namespace
-
-// static
-std::unique_ptr<AshTestEnvironment> AshTestEnvironment::Create() {
-  return base::MakeUnique<AshTestEnvironmentContent>();
-}
-
-AshTestEnvironmentContent::AshTestEnvironmentContent()
-    : thread_bundle_(base::MakeUnique<content::TestBrowserThreadBundle>()) {}
-
-AshTestEnvironmentContent::~AshTestEnvironmentContent() {}
-
-void AshTestEnvironmentContent::SetUp() {
-  ShellContentState* content_state = content_state_;
-  if (!content_state) {
-    test_shell_content_state_ = new TestShellContentState;
-    content_state = test_shell_content_state_;
-  }
-  ShellContentState::SetInstance(content_state);
-}
-
-void AshTestEnvironmentContent::TearDown() {
-  ShellContentState::DestroyInstance();
-}
-
-base::SequencedWorkerPool* AshTestEnvironmentContent::GetBlockingPool() {
-  return content::BrowserThread::GetBlockingPool();
-}
-
-std::unique_ptr<views::ViewsDelegate>
-AshTestEnvironmentContent::CreateViewsDelegate() {
-  return base::MakeUnique<AshTestViewsDelegateContent>();
-}
-
-}  // namespace test
-}  // namespace ash