[build] Deprecate windows toolchain support with GYP

Bug: chromium:645094
Change-Id: I04a7f6a4073a6a5c81546863d6f1f371fc74e65d
Reviewed-on: https://chromium-review.googlesource.com/691836
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48226}

gypfiles/gyp_environment.py

@@ -10,7 +10,6 @@ make sure settings are consistent between them, all setup should happen here.
 
 import os
 import sys
-import vs_toolchain
 
 SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))
 V8_ROOT = os.path.abspath(os.path.join(SCRIPT_DIR, os.pardir))
@@ -56,5 +55,3 @@ def set_environment():
     if not os.environ.get('GYP_GENERATORS'):
       # Default to ninja on all platforms.
       os.environ['GYP_GENERATORS'] = 'ninja'
-
-    vs_toolchain.SetEnvironmentAndGetRuntimeDllDirs()

gypfiles/gyp_v8

@@ -38,7 +38,6 @@ import platform
 import shlex
 import subprocess
 import sys
-import vs_toolchain
 
 script_dir = os.path.dirname(os.path.realpath(__file__))
 v8_root = os.path.abspath(os.path.join(script_dir, os.pardir))
@@ -101,16 +100,7 @@ def additional_include_files(args=[]):
 
 
 def run_gyp(args):
-  rc = gyp.main(args)
-
-  vs2013_runtime_dll_dirs = vs_toolchain.SetEnvironmentAndGetRuntimeDllDirs()
-  if vs2013_runtime_dll_dirs:
-    x64_runtime, x86_runtime = vs2013_runtime_dll_dirs
-    vs_toolchain.CopyVsRuntimeDlls(
-      os.path.join(v8_root, GetOutputDirectory()),
-      (x86_runtime, x64_runtime))
-
-  if rc != 0:
+  if gyp.main(args) != 0:
     print 'Error running GYP'
     sys.exit(rc)