Use packaged libchrome and libchromeos rather than in-tree references

src/platform/microbenchmark/SConstruct

 # -*- python -*-
 
 # Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import os
 
 env = Environment()
 
 driver_sources = env.Split("""microbenchmark.cc
                               main.cc""")
 
-# TODO: References to ../../third_party/chrome/ should be replaced by using
-# installed packages in the chroot.
 env.Append(
-    CPPPATH=['..', '../../third_party/chrome/files', '../../common'],
+    CPPPATH=['..'],
     CCFLAGS=['-g', '-fno-exceptions', '-Wall', '-Werror'],
-    LIBPATH=['../../third_party/chrome'],
     # These need to be included by anyone linking against _main.
     LIBS=['base', 'gtest', 'rt', 'pthread'],
 )
 for key in Split('CC CXX AR RANLIB LD NM CFLAGS CCFLAGS'):
   value = os.environ.get(key)
   if value != None:
     env[key] = value
 
 env_mainlib = env.Clone()
 env_mainlib.StaticLibrary('microbenchmark_main', driver_sources)