Work on GN toolchain definitions and build

tools/gn/secondary/third_party/WebKit/Source/wtf/BUILD.gn

 # Copyright 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.
 
 config("wtf-config") {
   include_dirs = [ ".." ]
   if (is_win) {
     include_dirs += [ "os-win32" ]
     defines = [
       "__STD_C",
@@ skipping 240 matching lines @@
 
   defines = [ "WTF_IMPLEMENTATION=1" ]
   deps = [
     "//third_party/icu:icui18n",
     "//third_party/icu:icuuc",
   ]
 
   #  # Disable c4267 warnings until we fix size_t to int truncations.
 # 'msvs_disabled_warnings': [4127, 4355, 4510, 4512, 4610, 4706, 4068, 4267],
 
+  ldflags = []
   if (is_android) {
     ldflags += [ "-llog" ]
   }
 
   if (is_mac) {
 #    'link_settings': {
 #            'libraries': [
 #              '$(SDKROOT)/System/Library/Frameworks/CoreFoundation.framework',
 #              '$(SDKROOT)/System/Library/Frameworks/Foundation.framework',
 #            ]
@@ skipping 87 matching lines @@
   #  # Disable c4267 warnings until we fix size_t to int truncations.
 # 'msvs_disabled_warnings': [4127, 4355, 4510, 4512, 4610, 4706, 4068, 4267],
 
 #  if (is_linux && use_tcmalloc) {
 #     deps += [
 #      "//base:base",
 #      "//base/allocator:allocator",
 #    ],
 #  }
 }