Adding fixed guids to some modules to facilitate incremental switch to gyp.

printing/printing.gyp

 # Copyright (c) 2009 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/common.gypi',
   ],
   'targets': [
     {
       'target_name': 'printing',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
       ],
+      'msvs_guid': '9E5416B9-B91B-4029-93F4-102C1AD5CAF4',
       'include_dirs': [
         '..',
       ],
       'sources': [
         'units.cc',
         'units.h',
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           '..',
@@ skipping 15 matching lines @@
       'dependencies': [
         'printing',
         '../testing/gtest.gyp:gtest',
       ],
       'sources': [
         'units_unittest.cc',
       ],
     },
   ],
 }