[Bindings] Create and use V8 context snapshots

net/BUILD.gn

 # Copyright (c) 2013 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.
 
 import("//build/buildflag_header.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
@@ skipping 2058 matching lines @@
         "websockets/websocket_handshake_stream_create_helper.cc",
         "websockets/websocket_handshake_stream_create_helper.h",
         "websockets/websocket_inflater.cc",
         "websockets/websocket_inflater.h",
         "websockets/websocket_stream.cc",
         "websockets/websocket_stream.h",
       ]
     }
 
     # ICU support.
-    if (use_platform_icu_alternatives) {
+    if (use_platform_icu_alternatives &&
+        current_toolchain == default_toolchain) {
       if (is_android) {
         # Use ICU alternative on Android.
         sources += [ "base/net_string_util_icu_alternatives_android.cc" ]
         deps += [ ":net_jni_headers" ]
       } else if (is_ios) {
         # Use ICU alternative on iOS.
         sources += [ "base/net_string_util_icu_alternatives_ios.mm" ]
       } else {
         assert(false,
                "ICU alternative is not implemented for platform: " + target_os)
@@ skipping 3844 matching lines @@
   ]
   deps = [
     ":net_fuzzer_test_support",
     ":test_support",
     "//base",
     "//net",
   ]
   dict = "data/fuzzer_dictionaries/net_spdy_session_fuzzer.dict"
   seed_corpus = "data/fuzzer_data/net_spdy_session_fuzzer/"
 }