Enable MSVC warning for unused locals.

chrome/browser/search/hotword_service_unittest.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 "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/field_trial.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/extension_service_test_base.h"
@@ skipping 99 matching lines @@
 INSTANTIATE_TEST_CASE_P(HotwordServiceTests,
                         HotwordServiceTest,
                         ::testing::Values(
                             extension_misc::kHotwordExtensionId,
                             extension_misc::kHotwordSharedModuleId));
 
 TEST_P(HotwordServiceTest, IsHotwordAllowedBadFieldTrial) {
   TestingProfile::Builder profile_builder;
   scoped_ptr<TestingProfile> profile = profile_builder.Build();
 
-  HotwordServiceFactory* hotword_service_factory =
-      HotwordServiceFactory::GetInstance();
-
   // Check that the service exists so that a NULL service be ruled out in
   // following tests.
   HotwordService* hotword_service =
-      hotword_service_factory->GetForProfile(profile.get());
+      HotwordServiceFactory::GetInstance()->GetForProfile(profile.get());
   EXPECT_TRUE(hotword_service != NULL);
 
   // When the field trial is empty or Disabled, it should not be allowed.
   std::string group = base::FieldTrialList::FindFullName(
       hotword_internal::kHotwordFieldTrialName);
   EXPECT_TRUE(group.empty());
   EXPECT_FALSE(HotwordServiceFactory::IsHotwordAllowed(profile.get()));
 
   ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
      hotword_internal::kHotwordFieldTrialName,
@@ skipping 10 matching lines @@
 
   // Test that incognito returns false as well.
   EXPECT_FALSE(HotwordServiceFactory::IsHotwordAllowed(
       profile->GetOffTheRecordProfile()));
 }
 
 TEST_P(HotwordServiceTest, IsHotwordAllowedLocale) {
   TestingProfile::Builder profile_builder;
   scoped_ptr<TestingProfile> profile = profile_builder.Build();
 
-  HotwordServiceFactory* hotword_service_factory =
-      HotwordServiceFactory::GetInstance();
-
   // Check that the service exists so that a NULL service be ruled out in
   // following tests.
   HotwordService* hotword_service =
-      hotword_service_factory->GetForProfile(profile.get());
+      HotwordServiceFactory::GetInstance()->GetForProfile(profile.get());
   EXPECT_TRUE(hotword_service != NULL);
 
   // Set the field trial to a valid one.
   ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
       hotword_internal::kHotwordFieldTrialName, "Good"));
 
   // Set the language to an invalid one.
   SetApplicationLocale(static_cast<Profile*>(profile.get()), "non-valid");
   EXPECT_FALSE(HotwordServiceFactory::IsHotwordAllowed(profile.get()));
 
@@ skipping 13 matching lines @@
   // still returns false.
   Profile* otr_profile = profile->GetOffTheRecordProfile();
   SetApplicationLocale(otr_profile, "en");
   EXPECT_FALSE(HotwordServiceFactory::IsHotwordAllowed(otr_profile));
 }
 
 TEST_P(HotwordServiceTest, AudioLoggingPrefSetCorrectly) {
   TestingProfile::Builder profile_builder;
   scoped_ptr<TestingProfile> profile = profile_builder.Build();
 
-  HotwordServiceFactory* hotword_service_factory =
-      HotwordServiceFactory::GetInstance();
   HotwordService* hotword_service =
-      hotword_service_factory->GetForProfile(profile.get());
+      HotwordServiceFactory::GetInstance()->GetForProfile(profile.get());
   EXPECT_TRUE(hotword_service != NULL);
 
   // If it's a fresh profile, although the default value is true,
   // it should return false if the preference has never been set.
   EXPECT_FALSE(hotword_service->IsOptedIntoAudioLogging());
 }
 
 TEST_P(HotwordServiceTest, ShouldReinstallExtension) {
   // Set the field trial to a valid one.
   ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
@@ skipping 190 matching lines @@
   EXPECT_FALSE(hotword_service->MaybeReinstallHotwordExtension());
   EXPECT_TRUE(hotword_service->IsAlwaysOnEnabled());
 
   // If the locale is set back to the last valid one, then an uninstall-install
   // shouldn't be needed.
   SetApplicationLocale(profile(), "fr_fr");
   EXPECT_TRUE(HotwordServiceFactory::IsHotwordAllowed(profile()));
   EXPECT_FALSE(hotword_service->MaybeReinstallHotwordExtension());
   EXPECT_TRUE(hotword_service->IsAlwaysOnEnabled());
 }