Provide option to disable full DEBUG build on Android.

build/common.gypi

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 323 matching lines @@
           },
           'VCLinkerTool': {
             'LinkIncremental': '2',
           },
         },
         'conditions': [
           ['OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="netbsd"', {
             'cflags': [ '-Wall', '<(werror)', '-W', '-Wno-unused-parameter',
                         '-Wnon-virtual-dtor', '-Woverloaded-virtual' ],
           }],
+          ['OS=="android"', {
+            'variables': {
+              'android_full_debug%': 1,
+            },
+            'conditions': [
+              ['android_full_debug==0', {
+                # Disable full debug if we want a faster v8 in a debug build.
+                # TODO(2304): pass DISABLE_DEBUG_ASSERT instead of hiding DEBUG.
+                'defines!': [
+                  'DEBUG',
+                ],
+              }],
+            ],
+          }],
         ],
       },  # Debug
       'Release': {
         'conditions': [
           ['OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="netbsd" \
             or OS=="android"', {
             'cflags!': [
               '-O2',
               '-Os',
             ],
@@ skipping 47 matching lines @@
                 'OptimizeReferences': '2',
                 'EnableCOMDATFolding': '2',
               },
             },
           }],  # OS=="win"
         ],  # conditions
       },  # Release
     },  # configurations
   },  # target_defaults
 }