Add ENABLE_PRINTING and disable it on Android.

printing/printing.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 69 matching lines @@
         'print_settings_initializer_win.h',
         'units.cc',
         'units.h',
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           '..',
         ],
       },
       'conditions': [
+        ['enable_printing!=1', {
+          'sources/': [
+            ['exclude', '.'],
+          ],
+        }],
         ['toolkit_uses_gtk == 0',{
             'sources/': [['exclude', '_cairo\\.cc$']]
         }],
         ['OS!="mac"', {'sources/': [['exclude', '_mac\\.(cc|mm?)$']]}],
         ['OS!="win"', {'sources/': [['exclude', '_win\\.cc$']]
           }, {  # else: OS=="win"
             'sources/': [['exclude', '_posix\\.cc$']]
         }],
         ['toolkit_uses_gtk == 1', {
           'dependencies': [
@@ skipping 102 matching lines @@
         'printing_test.h',
         'page_number_unittest.cc',
         'page_range_unittest.cc',
         'page_setup_unittest.cc',
         'pdf_metafile_cg_mac_unittest.cc',
         'printed_page_unittest.cc',
         'run_all_unittests.cc',
         'units_unittest.cc',
       ],
       'conditions': [
+        ['enable_printing!=1', {
+          'sources/': [
+            ['exclude', '.'],
+            ['include', 'run_all_unittests.cc'],
+          ],
+        }],
         ['toolkit_uses_gtk == 0', {'sources/': [['exclude', '_gtk_unittest\\.cc$']]}],
         ['OS!="mac"', {'sources/': [['exclude', '_mac_unittest\\.(cc|mm?)$']]}],
         ['OS!="win"', {'sources/': [['exclude', '_win_unittest\\.cc$']]}],
         ['OS=="win" and use_aura == 0', {
           'sources': [
             'printing_context_win_unittest.cc',
           ]
         }],
         ['toolkit_uses_gtk == 1', {
           'dependencies': [
@@ skipping 37 matching lines @@
                   '<!@(python cups_config_helper.py --cflags)',
                 ],
               }],
             ],
           },
         }],
       ],
     },
   ],
 }