Add product mode:

tools/gyp/configurations.gypi

 # Copyright (c) 2012, 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': {
     'common_gcc_warning_flags': [
       '-Wall',
       '-Wextra', # Also known as -W.
       '-Wno-unused-parameter',
@@ skipping 125 matching lines @@
         'abstract': 1,
       },
 
       'Dart_Release': {
         'abstract': 1,
         'defines': [
           'NDEBUG',
         ],
       },
 
+      'Dart_Product' : {
+        'abstract': 1,
+        'defines' : [
+          'NDEBUG',
+          'PRODUCT',
+        ]
+      },
 
       # Configurations
       'DebugIA32': {
         'inherit_from': [
           'Dart_Base', 'Dart_ia32_Base', 'Dart_Debug',
           'Dart_<(dart_target_os)_Base',
           'Dart_<(dart_target_os)_ia32_Base',
           'Dart_<(dart_target_os)_Debug',
         ],
       },
 
       'ReleaseIA32': {
         'inherit_from': [
           'Dart_Base', 'Dart_ia32_Base', 'Dart_Release',
           'Dart_<(dart_target_os)_Base',
           'Dart_<(dart_target_os)_ia32_Base',
           'Dart_<(dart_target_os)_Release',
         ],
       },
 
+      'ProductIA32': {
+        'inherit_from': [
+          'Dart_Base', 'Dart_ia32_Base', 'Dart_Product',
+          'Dart_<(dart_target_os)_Base',
+          'Dart_<(dart_target_os)_ia32_Base',
+          'Dart_<(dart_target_os)_Product',
+        ],
+      },
+
       'DebugX64': {
         'inherit_from': [
           'Dart_Base', 'Dart_x64_Base', 'Dart_Debug',
           'Dart_<(dart_target_os)_Base',
           'Dart_<(dart_target_os)_x64_Base',
           'Dart_<(dart_target_os)_Debug',
         ],
       },
 
       'ReleaseX64': {
         'inherit_from': [
           'Dart_Base', 'Dart_x64_Base', 'Dart_Release',
           'Dart_<(dart_target_os)_Base',
           'Dart_<(dart_target_os)_x64_Base',
           'Dart_<(dart_target_os)_Release',
         ],
       },
 

[Florian Schneider, 2016/02/03 18:00:21]

Add ProductX64, ProductXARM, ProductXARM64, etc?

       'DebugSIMARM': {
         'inherit_from': [
           'Dart_Base', 'Dart_simarm_Base', 'Dart_Debug',
           'Dart_<(dart_target_os)_Base',
           'Dart_<(dart_target_os)_simarm_Base',
           'Dart_<(dart_target_os)_Debug',
         ],
         'defines': [
           'DEBUG',
         ],
@@ skipping 353 matching lines @@
           },
 
           'ReleaseX64_x64': {
             'inherit_from': [ 'ReleaseX64' ]
           },
         }],
       ],
     },
   },
 }