Refactor the library tag handler to share code between standalone dart and the snapshot generator.

bin/bin.gypi

 # Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 {
   'variables': {
     'builtin_in_cc_file': 'builtin_in.cc',
     'builtin_cc_file': '<(SHARED_INTERMEDIATE_DIR)/builtin_gen.cc',
     'snapshot_in_cc_file': 'snapshot_in.cc',
     'snapshot_bin_file': '<(SHARED_INTERMEDIATE_DIR)/snapshot_gen.bin',
@@ skipping 117 matching lines @@
       'type': 'executable',
       'dependencies': [
         'libdart',
         'libdart_builtin',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         'main.cc',
-        'process_script.cc',
-        'process_script.h',
         'snapshot_empty.cc',
       ],
       'conditions': [
         ['OS=="win"', {
           'link_settings': {
             'libraries': [ '-lws2_32.lib', '-lRpcrt4.lib' ],
           },
        }]],
     },
     {
       # Completely statically linked dart binary.
       'target_name': 'dart_no_snapshot_bin',
       'type': 'executable',
       'dependencies': [
         'libdart_lib',
         'libdart_vm',
         'libjscre',
         'libdart_api',
         'libdart_builtin',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         'main.cc',
-        'process_script.cc',
-        'process_script.h',
         'snapshot_empty.cc',
       ],
       'conditions': [
         ['OS=="win"', {
           'link_settings': {
             'libraries': [ '-lws2_32.lib', '-lRpcrt4.lib' ],
           },
        }]],
     },
     {
       # Completely statically linked binary for generating snapshots.
       'target_name': 'gen_snapshot_bin',
       'type': 'executable',
       'dependencies': [
         'libdart_lib',
         'libdart_vm',
         'libjscre',
         'libdart_api',
         'libdart_builtin',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         'gen_snapshot.cc',
-        'process_script.cc',
-        'process_script.h',
       ],
       'conditions': [
         ['OS=="win"', {
           'link_settings': {
             'libraries': [ '-lws2_32.lib', '-lRpcrt4.lib' ],
           },
        }]],
     },
     {
       # Generate snapshot file.
@@ skipping 38 matching lines @@
       'dependencies': [
         'libdart',
         'libdart_builtin',
         'generate_snapshot_file',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         'main.cc',
-        'process_script.cc',
-        'process_script.h',
         '<(snapshot_cc_file)',
       ],
       'conditions': [
         ['OS=="win"', {
           'link_settings': {
             'libraries': [ '-lws2_32.lib', '-lRpcrt4.lib' ],
           },
        }]],
     },
     {
       # Completely statically linked dart binary with a snapshot of the core
       # and builtin libraries linked in.
       'target_name': 'dart_bin',
       'type': 'executable',
       'dependencies': [
         'libdart_lib',
         'libdart_vm',
         'libjscre',
         'libdart_api',
         'libdart_builtin',
         'generate_snapshot_file',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         'main.cc',
-        'process_script.cc',
-        'process_script.h',
         '<(snapshot_cc_file)',
       ],
       'conditions': [
         ['OS=="win"', {
           'link_settings': {
             'libraries': [ '-lws2_32.lib', '-lRpcrt4.lib' ],
           },
        }]],
     },
     {
@@ skipping 126 matching lines @@
         ]}],
         ['OS=="win"', {
           'link_settings': {
             'libraries': [ '-lws2_32.lib', '-lRpcrt4.lib' ],
           },
         }],
       ],
     },
   ],
 }