Infrastructure for reading V8's initial snapshot from external files

build/common.gypi

 # Copyright (c) 2012 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 2348 matching lines @@
       '<(PRODUCT_DIR)/default_apps/external_extensions.json',
       '<(PRODUCT_DIR)/default_apps/gmail.crx',
       '<(PRODUCT_DIR)/default_apps/search.crx',
       '<(PRODUCT_DIR)/default_apps/youtube.crx',
       '<(PRODUCT_DIR)/default_apps/drive.crx',
       '<(PRODUCT_DIR)/default_apps/docs.crx',
     ],
 
     # Whether to allow building of the GPU-related isolates.
     'archive_gpu_tests%': 0,
+    'v8_use_external_startup_data': 1,
   },
   'target_defaults': {
     'variables': {
       # The condition that operates on chromium_code is in a target_conditions
       # section, and will not have access to the default fallback value of
       # chromium_code at the top of this file, or to the chromium_code
       # variable placed at the root variables scope of .gyp files, because
       # those variables are not set at target scope.  As a workaround,
       # if chromium_code is not set at target scope, define it in target scope
       # to contain whatever value it has during early variable expansion.
@@ skipping 581 matching lines @@
       }],
       ['enable_ipc_fuzzer==1', {
         'defines': ['ENABLE_IPC_FUZZER=1'],
       }],
       ['video_hole==1', {
         'defines': ['VIDEO_HOLE=1'],
       }],
       ['enable_load_completion_hacks==1', {
         'defines': ['ENABLE_LOAD_COMPLETION_HACKS=1'],
       }],
+      ['v8_use_external_startup_data==1', {
+       'defines': ['V8_USE_EXTERNAL_STARTUP_DATA'],
+      }],
     ],  # conditions for 'target_defaults'
     'target_conditions': [
       ['<(use_openssl)==1', {
         'defines': ['USE_OPENSSL=1'],
       }],
       ['<(use_openssl_certs)==1', {
         'defines': ['USE_OPENSSL_CERTS=1'],
       }],
       ['>(nacl_untrusted_build)==1', {
         'defines': [
@@ skipping 2799 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }