Make ApplicationTestBase not use ApplicationImpl.

services/url_response_disk_cache/url_response_disk_cache_apptest.cc

 // Copyright 2015 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/files/file_util.h"
 #include "base/rand_util.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
-#include "mojo/public/cpp/application/application_impl.h"
 #include "mojo/public/cpp/application/application_test_base.h"
 #include "mojo/public/cpp/application/connect.h"
 #include "mojo/public/cpp/system/data_pipe.h"
 #include "mojo/services/network/interfaces/url_loader.mojom.h"
 #include "mojo/services/url_response_disk_cache/interfaces/url_response_disk_cache.mojom.h"
 #include "services/url_response_disk_cache/kTestData.h"
 
 namespace mojo {
 
 namespace {
 
 class URLResponseDiskCacheAppTest : public mojo::test::ApplicationTestBase {
  public:
   URLResponseDiskCacheAppTest() : ApplicationTestBase() {}
   ~URLResponseDiskCacheAppTest() override {}
 
   void SetUp() override {
     test::ApplicationTestBase::SetUp();
-    ConnectToService(application_impl()->shell(),
-                     "mojo:url_response_disk_cache",
+    ConnectToService(shell(), "mojo:url_response_disk_cache",
                      GetProxy(&url_response_disk_cache_));
   }
 
  protected:
   URLResponseDiskCachePtr url_response_disk_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(URLResponseDiskCacheAppTest);
 };
 
 base::FilePath toPath(Array<uint8_t> path) {
@@ skipping 283 matching lines @@
       });
   url_response_disk_cache_.WaitForIncomingResponse();
   ASSERT_FALSE(file.empty());
   ASSERT_TRUE(base::ReadFileToString(file, &received_content));
   EXPECT_EQ(new_content, received_content);
   saved_file = cache_dir.Append("file");
   EXPECT_FALSE(base::PathExists(saved_file));
 }
 
 }  // namespace mojo