Move ExtensionServiceTestBase into it's own header/cc file

chrome/browser/ui/app_list/app_list_test_util.cc

 // Copyright 2014 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/browser/ui/app_list/app_list_test_util.h"
 
 #include "base/files/file_path.h"
+#include "chrome/browser/extensions/extension_service.h"
 #include "chrome/common/chrome_constants.h"
 #include "extensions/common/extension_set.h"
 
 const char AppListTestBase::kHostedAppId[] =
     "dceacbkfkmllgmjmbhgkpjegnodmildf";
 const char AppListTestBase::kPackagedApp1Id[] =
     "emfkafnhnpcmabnnkckkchdilgeoekbo";
 const char AppListTestBase::kPackagedApp2Id[] =
     "jlklkagmeajbjiobondfhiekepofmljl";
 
 AppListTestBase::AppListTestBase() {}
 
 AppListTestBase::~AppListTestBase() {}
 
 void AppListTestBase::SetUp() {
-  ExtensionServiceTestBase::SetUp();
+  extensions::ExtensionServiceTestBase::SetUp();
 
   // Load "app_list" extensions test profile.
   // The test profile has 5 extensions:
   // - 1 dummy extension (which should not be visible in the launcher)
   // - 2 packaged extension apps
   // - 1 hosted extension app
   // - 1 ephemeral app (which should not be visible in the launcher)
-  base::FilePath source_install_dir = data_dir_
-      .AppendASCII("app_list")
-      .AppendASCII("Extensions");
+  base::FilePath source_install_dir =
+      data_dir().AppendASCII("app_list").AppendASCII("Extensions");
   base::FilePath pref_path = source_install_dir
       .DirName()
       .Append(chrome::kPreferencesFilename);
   InitializeInstalledExtensionService(pref_path, source_install_dir);
   service_->Init();
 
   // There should be 5 extensions in the test profile.
   const extensions::ExtensionSet* extensions = service_->extensions();
   ASSERT_EQ(static_cast<size_t>(5),  extensions->size());
 }