Use a direct include of strings headers in chromeos/.

chromeos/dbus/ibus/ibus_property_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 "chromeos/dbus/ibus/ibus_property.h"
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/string_number_conversions.h"
+#include "base/strings/string_number_conversions.h"
 #include "chromeos/dbus/ibus/ibus_object.h"
 #include "dbus/message.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace chromeos {
 namespace {
 
 const char kSampleKey[] = "Key";
 const IBusProperty::IBusPropertyType kSampleType =
@@ skipping 88 matching lines @@
   EXPECT_TRUE(CheckProperty("Root_", target_property));
   const IBusPropertyList& sub_properties = target_property.sub_properties();
   ASSERT_EQ(kSubPropertyCount, sub_properties.size());
   for (size_t i = 0; i < kSubPropertyCount; ++i) {
     const std::string prefix = "Sub" + base::Uint64ToString(i);
     EXPECT_TRUE(CheckProperty(prefix, *(sub_properties[i])));
   }
 }
 
 }  // namespace chromeos