Replace base::NullableString16(bool) usage with default constructor.

webkit/browser/dom_storage/dom_storage_database_unittest.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 "webkit/browser/dom_storage/dom_storage_database.h"
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/path_service.h"
@@ skipping 139 matching lines @@
     ASSERT_TRUE(db.CommitChanges(false, storage));
   }
 
   EXPECT_TRUE(file_util::PathExists(file_name));
 
   {
     DomStorageDatabase db(file_name);
     ASSERT_TRUE(db.CommitChanges(false, storage));
     ValuesMap::iterator it = storage.begin();
     for (; it != storage.end(); ++it)
-      it->second = base::NullableString16(true);
+      it->second = base::NullableString16();
     ASSERT_TRUE(db.CommitChanges(false, storage));
   }
   EXPECT_FALSE(file_util::PathExists(file_name));
 }
 
 TEST(DomStorageDatabaseTest, TestLazyOpenIsLazy) {
   // This test needs to operate with a file on disk to ensure that we will
   // open a file that already exists when only invoking ReadAllValues.
   base::ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
@@ skipping 119 matching lines @@
   ValuesMap expected;
   expected[kCannedKey] = kCannedValue;
 
   // First write some data into the database.
   ASSERT_TRUE(db.CommitChanges(false, expected));
   CheckValuesMatch(&db, expected);
 
   ValuesMap values;
   // A null string in the map should mean that that key gets
   // removed.
-  values[kCannedKey] = base::NullableString16(true);
+  values[kCannedKey] = base::NullableString16();
   EXPECT_TRUE(db.CommitChanges(false, values));
 
   expected.clear();
   CheckValuesMatch(&db, expected);
 }
 
 TEST(DomStorageDatabaseTest, TestCanOpenAndReadWebCoreDatabase) {
   base::FilePath webcore_database;
   PathService::Get(base::DIR_SOURCE_ROOT, &webcore_database);
   webcore_database = webcore_database.AppendASCII("webkit");
@@ skipping 61 matching lines @@
 
     db.ReadAllValues(&values);
     EXPECT_EQ(0u, values.size());
     EXPECT_FALSE(db.IsOpen());
 
     EXPECT_TRUE(file_util::PathExists(temp_dir.path()));
   }
 }
 
 }  // namespace dom_storage