[Sync] Enable Compression from Client to Server by experiment

components/sync/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/buildflag_header.gni")
 import("//build/config/features.gni")
 import("//components/sync/protocol/protocol_sources.gni")
 import("//testing/test.gni")
 
 static_library("sync") {
@@ skipping 543 matching lines @@
     "//components/signin/core/browser",
     "//components/sync/engine_impl/attachments/proto",
     "//components/version_info",
     "//crypto",
     "//google_apis",
     "//net",
     "//sql",
     "//third_party/cacheinvalidation",
     "//third_party/leveldatabase",
     "//third_party/zlib",
+    "//third_party/zlib:compression_utils",

[Ilya Sherman, 2016/10/19 23:35:56]

Did you just want me to review this added dependency?  If so, LGTM.

[Gang Wu, 2016/10/19 23:38:42]

Yes, for this dependency.

     "//url",
   ]
 
   if (is_android) {
     deps += [ "//components/sync/android:jni_headers" ]
     sources += [
       "android/model_type_helper.cc",
       "android/model_type_helper.h",
       "android/sync_jni_registrar.cc",
       "android/sync_jni_registrar.h",
@@ skipping 521 matching lines @@
     deps = [
       ":fake_server_jni",
       ":sync",
       ":test_support_fake_server",
       "//base",
       "//testing/gtest",
       "//url:url",
     ]
   }
 }