clang/win: Stop force-including intrin.h everywhere.

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/compiler/compiler.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/win/visual_studio_version.gni")
 import("//build/toolchain/toolchain.gni")
 
 assert(is_win)
@@ skipping 46 matching lines @@
       # they are disabled on other platforms. See crbug.com/587210
       # and -fno-threadsafe-statics.
       "/Zc:threadSafeInit-",
     ]
   }
 
   # Building with Clang on Windows is a work in progress and very
   # experimental. See crbug.com/82385.
   # Keep this in sync with the similar block in build/common.gypi
   if (is_clang) {
-    cflags += [
-      # Many files use intrinsics without including this header.
-      # TODO(hans): Fix those files, or move this to sub-GYPs,
-      # https://crbug.com/592745
-      "/FIintrin.h",
-    ]
-
     if (visual_studio_version == "2013") {
       cflags += [ "-fmsc-version=1800" ]
     } else if (visual_studio_version == "2015") {
       cflags += [ "-fmsc-version=1900" ]
     }
 
     if (current_cpu == "x86") {
       cflags += [ "-m32" ]
     } else {
       cflags += [ "-m64" ]
@@ skipping 302 matching lines @@
 
 # Internal stuff --------------------------------------------------------------
 
 # Config used by the MIDL template to disable warnings.
 config("midl_warnings") {
   if (is_clang) {
     # MIDL generates code like "#endif !_MIDL_USE_GUIDDEF_".
     cflags = [ "-Wno-extra-tokens" ]
   }
 }