move v8_use_external_startup_data to standalone.gypi

build/standalone.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 75 matching lines @@
     #     debug. This may still be 2x slower than Release (or worse).
     # 2 - Turn on optimizations, and also #undef DEBUG / #define NDEBUG
     #     (but leave V8_ENABLE_CHECKS and most other assertions enabled.
     #     This may cause some v8 tests to fail in the Debug configuration.
     #     This roughly matches the performance of a Release build and can
     #     be used by embedders that need to build their own code as debug
     #     but don't want or need a debug version of V8. This should produce
     #     near-release speeds.
     'v8_optimized_debug%': 0,
 
+    # Use external files for startup data blobs:
+    # the JS builtins sources and the start snapshot.
+    # Embedders that don't use standalone.gypi will need to add
+    # their own default value.
+    'v8_use_external_startup_data%': 0,
+
     # Relative path to icu.gyp from this file.
     'icu_gyp_path': '../third_party/icu/icu.gyp',
 
     'conditions': [
       ['(v8_target_arch=="arm" and host_arch!="arm") or \
         (v8_target_arch=="arm64" and host_arch!="arm64") or \
         (v8_target_arch=="mipsel" and host_arch!="mipsel") or \
         (v8_target_arch=="mips64el" and host_arch!="mips64el") or \
         (v8_target_arch=="x64" and host_arch!="x64") or \
         (OS=="android" or OS=="qnx")', {
@@ skipping 338 matching lines @@
       ],
     }],
     ['clang==1 and OS=="win"', {
       'make_global_settings': [
         # On Windows, gyp's ninja generator only looks at CC.
         ['CC', '<(make_clang_dir)/bin/clang-cl'],
       ],
     }],
   ],
 }