Optionally compress V8 code cache data with snappy.

Source/core/BUILD.gn

 # Copyright 2014 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/config/ui.gni")
 import("//third_party/WebKit/Source/bindings/bindings.gni")
 import("//third_party/WebKit/Source/bindings/core/v8/generated.gni")
 import("//third_party/WebKit/Source/bindings/modules/modules.gni")
 import("//third_party/WebKit/Source/bindings/modules/v8/generated.gni")
 import("//third_party/WebKit/Source/bindings/scripts/scripts.gni")
@@ skipping 72 matching lines @@
     "//skia",
     "//third_party/angle:translator",
     "//third_party/iccjpeg",
     "//third_party/libpng",
     "//third_party/libwebp",
     "//third_party/libxml",
     "//third_party/libxslt",
     "//third_party/npapi",
     "//third_party/ots",
     "//third_party/qcms",
+    "//third_party/snappy",
     "//third_party/sqlite",
     "//third_party/zlib",
     "//url",
     "//v8",
   ]
   deps = [
     ":make_core_generated",
     "inspector:protocol_sources",
     "inspector:instrumentation_sources",
     "//third_party/WebKit/Source/bindings/core/v8:bindings_core_v8_generated",
@@ skipping 963 matching lines @@
     "$blink_core_output_dir/{{source_name_part}}.h",
   ]
   args = [
     "{{source}}",
     rel_blink_core_gen_dir,
     bison_exe,
   ]
 
   deps = make_core_generated_deps
 }