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

chrome/browser/prefs/profile_pref_store_manager_unittest.cc

Index: chrome/browser/prefs/profile_pref_store_manager_unittest.cc
diff --git a/chrome/browser/prefs/profile_pref_store_manager_unittest.cc b/chrome/browser/prefs/profile_pref_store_manager_unittest.cc
index 45230ca0d11391be210cecf9bfff67f96303712e..81ff412b743f67a958549203de5a9b2762dd319c 100644
--- a/chrome/browser/prefs/profile_pref_store_manager_unittest.cc
+++ b/chrome/browser/prefs/profile_pref_store_manager_unittest.cc
@@ -7,6 +7,7 @@
 #include <stddef.h>
 
 #include <memory>
+#include <utility>
 #include <vector>
 
 #include "base/compiler_specific.h"
@@ -319,10 +320,12 @@ TEST_F(ProfilePrefStoreManagerTest, ProtectValues) {
 }
 
 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();