chromeos: Initialize StatisticsRecorder in AshTestSuite

ash/test/ash_test_suite.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 "ash/test/ash_test_suite.h"
 
 #include "ash/public/cpp/config.h"
 #include "ash/test/ash_test_environment.h"
 #include "ash/test/ash_test_helper.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/i18n/rtl.h"
+#include "base/metrics/statistics_recorder.h"
 #include "base/path_service.h"
 #include "build/build_config.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/ui_base_paths.h"
 #include "ui/compositor/test/fake_context_factory.h"
 #include "ui/gfx/gfx_paths.h"
 #include "ui/gl/test/gl_surface_test_support.h"
 
 namespace ash {
 namespace test {
 
 AshTestSuite::AshTestSuite(int argc, char** argv) : TestSuite(argc, argv) {}
 
 AshTestSuite::~AshTestSuite() {}
 
 void AshTestSuite::Initialize() {
   base::TestSuite::Initialize();
+  // Ensure histograms hit during tests are registered properly.
+  base::StatisticsRecorder::Initialize();
   gl::GLSurfaceTestSupport::InitializeOneOff();
 
   gfx::RegisterPathProvider();
   ui::RegisterPathProvider();
 
   // Force unittests to run using en-US so if we test against string output,
   // it'll pass regardless of the system language.
   base::i18n::SetICUDefaultLocale("en_US");
 
   // Load ash test resources and en-US strings; not 'common' (Chrome) resources.
@@ skipping 31 matching lines @@
 }
 
 void AshTestSuite::Shutdown() {
   env_.reset();
   ui::ResourceBundle::CleanupSharedInstance();
   base::TestSuite::Shutdown();
 }
 
 }  // namespace test
 }  // namespace ash