(Do not land) Very hacky patch for using -fprofile-functions in the Win-Clang build

build/config/BUILDCONFIG.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.
 
 # =============================================================================
 # WHAT IS THIS FILE?
 # =============================================================================
 #
 # This is the master GN build configuration. This file is loaded after the
 # build args (args.gn) for the build directory and after the toplevel ".gn"
@@ skipping 132 matching lines @@
        current_cpu != "ppc" && current_cpu != "mips" && current_cpu != "mips64")
 
   # Allows the path to a custom target toolchain to be injected as a single
   # argument, and set as the default toolchain.
   custom_toolchain = ""
 
   # This should not normally be set as a build argument.  It's here so that
   # every toolchain can pass through the "global" value via toolchain_args().
   host_toolchain = ""
 
+  # XXX: This is probably not the right place.
+  use_order_profiling = false
+
   # DON'T ADD MORE FLAGS HERE. Read the comment above.
 }
 
 declare_args() {
   # Debug build. Enabling official builds automatically sets is_debug to false.
   is_debug = !is_official_build
 }
 
 declare_args() {
   # Component build. Setting to true compiles targets declared as "components"
@@ skipping 378 matching lines @@
   if (current_os != "aix") {
     default_compiler_configs +=
         [ "//build/config/gcc:symbol_visibility_hidden" ]
   }
 }
 
 if (is_android) {
   default_compiler_configs +=
       [ "//build/config/android:default_cygprofile_instrumentation" ]
 }
+if (is_win) {
+  default_compiler_configs +=
+      [ "//build/config/win:default_cygprofile_instrumentation" ]
+}
 
 if (is_clang && !is_nacl) {
   default_compiler_configs += [
     "//build/config/clang:find_bad_constructs",
     "//build/config/clang:extra_warnings",
   ]
 }
 
 # Debug/release-related defines.
 if (is_debug) {
@@ skipping 129 matching lines @@
 set_defaults("component") {
   if (is_component_build) {
     configs = default_shared_library_configs
     if (is_android) {
       configs -= [ "//build/config/android:hide_all_but_jni_onload" ]
     }
   } else {
     configs = default_compiler_configs
   }
 }