Update AutoImport to import nothing by default (in absence of policy and master_prefs).

chrome/browser/prefs/profile_pref_store_manager_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 "chrome/browser/prefs/profile_pref_store_manager.h"
 
 #include <stddef.h>
 
 #include <memory>
+#include <utility>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/run_loop.h"
@@ skipping 292 matching lines @@
   EXPECT_NE(ProfilePrefStoreManager::kPlatformSupportsPreferenceTracking,
             pref_store_->GetValue(kProtectedAtomic, NULL));
   VerifyResetRecorded(
       ProfilePrefStoreManager::kPlatformSupportsPreferenceTracking);
 
   ExpectValidationObserved(kTrackedAtomic);
   ExpectValidationObserved(kProtectedAtomic);
 }
 
 TEST_F(ProfilePrefStoreManagerTest, InitializePrefsFromMasterPrefs) {
-  base::DictionaryValue master_prefs;
-  master_prefs.Set(kTrackedAtomic, new base::StringValue(kFoobar));
-  master_prefs.Set(kProtectedAtomic, new base::StringValue(kHelloWorld));
-  EXPECT_TRUE(manager_->InitializePrefsFromMasterPrefs(master_prefs));
+  std::unique_ptr<base::DictionaryValue> master_prefs =

[grt (UTC plus 2), 2017/02/23 21:19:01]

auto here, too

[gab, 2017/02/23 23:27:53]

Done.

+      base::MakeUnique<base::DictionaryValue>();
+  master_prefs->Set(kTrackedAtomic, new base::StringValue(kFoobar));
+  master_prefs->Set(kProtectedAtomic, new base::StringValue(kHelloWorld));
+  EXPECT_TRUE(
+      manager_->InitializePrefsFromMasterPrefs(std::move(master_prefs)));
 
   LoadExistingPrefs();
 
   // Verify that InitializePrefsFromMasterPrefs correctly applied the MACs
   // necessary to authenticate these values.
   ExpectStringValueEquals(kTrackedAtomic, kFoobar);
   ExpectStringValueEquals(kProtectedAtomic, kHelloWorld);
   VerifyResetRecorded(false);
 }
 
@@ skipping 144 matching lines @@
 
   // Trigger the logic that migrates it back to the unprotected preferences
   // file.
   pref_store_->SetValue(kProtectedAtomic,
                         base::WrapUnique(new base::StringValue(kGoodbyeWorld)),
                         WriteablePrefStore::DEFAULT_PREF_WRITE_FLAGS);
   LoadExistingPrefs();
   ExpectStringValueEquals(kProtectedAtomic, kGoodbyeWorld);
   VerifyResetRecorded(false);
 }