Enables GN build on windows

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 47 matching lines @@
 }
 
 # This default linker setup is provided separately from the SDK setup so
 # targets who want different library configurations can remove this and specify
 # their own.
 config("common_linker_setup") {
   ldflags = [
     "/FIXED:NO",
     "/ignore:4199",
     "/ignore:4221",
+    "/ignore:4197",  # Disable multiple Dart_True export warning.
     "/NXCOMPAT",
 
     # Suggested by Microsoft Devrel to avoid
     #   LINK : fatal error LNK1248: image size (80000000)
     #   exceeds maximum allowable size (80000000)
     # which started happening more regularly after VS2013 Update 4.
     "/maxilksize:2147483647",
   ]
 
   # ASLR makes debugging with windbg difficult because Chrome.exe and
   # Chrome.dll share the same base name. As result, windbg will name the
   # Chrome.dll module like chrome_<base address>, where <base address>
   # typically changes with each launch. This in turn means that breakpoints in
   # Chrome.dll don't stick from one launch to the next. For this reason, we
   # turn ASLR off in debug builds.
   if (is_debug) {
     ldflags += [ "/DYNAMICBASE:NO" ]
   } else {
     ldflags += [ "/DYNAMICBASE" ]
   }
-
-  # Delay loaded DLLs.
-  ldflags += [
-    "/DELAYLOAD:dbghelp.dll",
-    "/DELAYLOAD:dwmapi.dll",
-    "/DELAYLOAD:shell32.dll",
-    "/DELAYLOAD:uxtheme.dll",
-  ]
 }
 
-# Subsystem --------------------------------------------------------------------
+# Subsystem -------------------------------------------------------------------
 
 # This is appended to the subsystem to specify a minimum version.
 if (current_cpu == "x64") {
   # The number after the comma is the minimum required OS version.
   # 5.02 = Windows Server 2003.
   subsystem_version_suffix = ",5.02"
 } else {
   # 5.01 = Windows XP.
   subsystem_version_suffix = ",5.01"
 }
 
 config("console") {
   ldflags = [ "/SUBSYSTEM:CONSOLE$subsystem_version_suffix" ]
 }
 config("windowed") {
   ldflags = [ "/SUBSYSTEM:WINDOWS$subsystem_version_suffix" ]
 }
 
-# Incremental linking ----------------------------------------------------------
+# Incremental linking ---------------------------------------------------------
 
 incremental_linking_on_switch = [ "/INCREMENTAL" ]
 incremental_linking_off_switch = [ "/INCREMENTAL:NO" ]
 if (is_debug) {
   default_incremental_linking_switch = incremental_linking_on_switch
 } else {
   default_incremental_linking_switch = incremental_linking_off_switch
 }
 
 # Applies incremental linking or not depending on the current configuration.
@@ skipping 16 matching lines @@
   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 ----------------------------------------------------------------
+# Character set ---------------------------------------------------------------
 
 # Not including this config means "ansi" (8-bit system codepage).
 config("unicode") {
   defines = [
     "_UNICODE",
     "UNICODE",
   ]
 }
 
-# Lean and mean ----------------------------------------------------------------
+# Lean and mean ---------------------------------------------------------------
 
 # Some third party code might not compile with WIN32_LEAN_AND_MEAN so we have
 # to have a separate config for it. Remove this config from your target to
 # get the "bloaty and accomodating" version of windows.h.
 config("lean_and_mean") {
   defines = [ "WIN32_LEAN_AND_MEAN" ]
 }
 
 # 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" ]
 }