shill: Convert code to use the newest version of libchrome.

The biggest change is a switch from using the deprecated
Task and CallbackN mechanisms to using the new Callback
mechanism.

Note: Original CL was https://gerrit.chromium.org/gerrit/16156.
This is logically another patch to that CL, but since the
latter was already merged, and is considered closed by
Gerrit, it's necessary to create a new CL.

BUG=chromium-os:15330
TEST=Build shill and run it on a zgb with a modem. Build and
run unit tests.
CQ-DEPEND=I37628863370323d30cac493764ea28f8ffd42637

Change-Id: I3ae78a3aa44ec167b79f2170d07650ece888254f
Reviewed-on: https://gerrit.chromium.org/gerrit/18030
Reviewed-by: Eric Shienbrood <ers@chromium.org>
Tested-by: Eric Shienbrood <ers@chromium.org>
Commit-Ready: Eric Shienbrood <ers@chromium.org>
diff --git a/modem_manager_unittest.cc b/modem_manager_unittest.cc
index 46f2fdc..4df3150 100644
--- a/modem_manager_unittest.cc
+++ b/modem_manager_unittest.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include <base/stl_util-inl.h>
+#include <base/stl_util.h>
 #include <gtest/gtest.h>
 #include <mm/mm-modem.h>
 
@@ -122,7 +122,6 @@
   EXPECT_EQ(kOwner, modem_manager_.owner_);
   EXPECT_EQ(1, modem_manager_.modems_.size());
   ASSERT_TRUE(ContainsKey(modem_manager_.modems_, kModemPath));
-  EXPECT_FALSE(modem_manager_.modems_[kModemPath]->task_factory_.empty());
 }
 
 TEST_F(ModemManagerTest, Disconnect) {
@@ -150,7 +149,6 @@
   modem_manager_.AddModem(kModemPath);
   EXPECT_EQ(1, modem_manager_.modems_.size());
   ASSERT_TRUE(ContainsKey(modem_manager_.modems_, kModemPath));
-  EXPECT_FALSE(modem_manager_.modems_[kModemPath]->task_factory_.empty());
 
   modem_manager_.RemoveModem(kModemPath);
   EXPECT_EQ(0, modem_manager_.modems_.size());