Implement native metafile for printing on Linux....

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',
@@ skipping 22 matching lines @@
         'image.h',
         'native_metafile.h',
         'page_number.cc',
         'page_number.h',
         'page_overlays.cc',
         'page_overlays.h',
         'page_range.cc',
         'page_range.h',
         'page_setup.cc',
         'page_setup.h',
+        'pdf_ps_metafile_linux.h',
+        'pdf_ps_metafile_linux.cc',
         'print_settings.cc',
         'print_settings.h',
         'printed_document.cc',
         'printed_document.h',
         'printed_page.cc',
         'printed_page.h',
         'printed_pages_source.h',
         'printing_context.h',
         'printing_context_linux.cc',
         'printing_context_mac.cc',        
@@ skipping 30 matching lines @@
         '../testing/gtest.gyp:gtest',
         '../testing/gtest.gyp:gtestmain',
       ],
       'sources': [
         'emf_win_unittest.cc',
         'printing_test.h',
         'page_number_unittest.cc',
         'page_overlays_unittest.cc',
         'page_range_unittest.cc',
         'page_setup_unittest.cc',
+        'pdf_ps_metafile_linux_unittest.cc',
         'printing_context_win_unittest.cc',
         'run_all_unittests.cc',
         'units_unittest.cc',
       ],
       'conditions': [
         ['OS!="linux"', {'sources/': [['exclude', '_linux_unittest\\.cc$']]}],
         ['OS!="mac"', {'sources/': [['exclude', '_mac_unittest\\.(cc|mm?)$']]}],
         ['OS!="win"', {
           'sources/': [
             ['exclude', '_win_unittest\\.cc$'],
 
             # Most of the printing functionailty is Windows only for now.
             ['exclude', '.*'],
             ['include', 'page_range_unittest.cc'],
             ['include', 'page_setup_unittest.cc'],            
             ['include', 'units_unittest.cc'],
           ]
         }, {  # else: OS=="win"
           'sources/': [['exclude', '_posix_unittest\\.cc$']]
         }],
+        ['OS=="linux"', {
+          'dependencies': [
+            '../base/base.gyp:base_gfx',
+         ],
+         'sources/': [
+            ['include', 'pdf_ps_metafile_linux_unittest.cc'],
+          ]
+        }],
       ],
     },
   ],
-}
+}