Starting work on full GN build

build/config/win/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/config/win/visual_studio_version.gni")
 
 # Compiler setup for the Windows SDK. Applied to all targets.
 config("sdk") {
   # The include path is the stuff returned by the script.
   #include_dirs = msvc_config[0]  TODO(brettw) make this work.
@@ skipping 123 matching lines @@
   ldflags = incremental_linking_on_switch
 }
 config("no_incremental_linking") {
   ldflags = incremental_linking_off_switch
 }
 
 # Some large modules can't handle incremental linking in some situations. This
 # config should be applied to large modules to turn off incremental linking
 # when it won't work.
 config("default_large_module_incremental_linking") {
-  if (symbol_level > 0 && (current_cpu == "x86" || !is_component_build)) {
+  if (current_cpu == "x86" || !is_component_build) {
     # When symbols are on, things get so large that the tools fail due to the
     # size of the .ilk files.
     ldflags = incremental_linking_off_switch
   } else {
     # Otherwise just do the default incremental linking for this build type.
     ldflags = default_incremental_linking_switch
   }
 }
 
 # Character set ----------------------------------------------------------------
@@ skipping 17 matching lines @@
 
 # Nominmax --------------------------------------------------------------------
 
 # Some third party code defines NOMINMAX before including windows.h, which
 # then causes warnings when it's been previously defined on the command line.
 # For such targets, this config can be removed.
 
 config("nominmax") {
   defines = [ "NOMINMAX" ]
 }