Win-clang update script: make an auxiliary copy of the sanitizer headers

build/common.gypi

 # Copyright (c) 2012 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 5042 matching lines @@
                 ],
               },
             }],
             ['asan==1', {
               # ASan on Windows is a work in progress and very experimental.
               # See crbug.com/345874.
               'VCCLCompilerTool': {
                 'AdditionalOptions': [
                   '-fsanitize=address',
                 ],
+                'AdditionalIncludeDirectories': [
+                  # MSVC needs to be able to find the sanitizer headers when
+                  # invoked via /fallback.

[Timur Iskhodzhanov, 2014/05/16 09:22:43]

Please add
"... which is critical to use macros like ASAN_UNPOISON_MEMORY_REGION in files
where we fall back."

[hans, 2014/05/16 16:39:47]

Done.

+                  '<(DEPTH)/<(make_clang_dir)/lib/clang/3.5.0/include_sanitizer',
+                ],
               },
               'VCLinkerTool': {
                 'AdditionalLibraryDirectories': [
                   # TODO(hans): If make_clang_dir is absolute, this breaks.
                   '<(DEPTH)/<(make_clang_dir)/lib/clang/3.5.0/lib/windows',
                 ],
               },
               'target_conditions': [
                 ['_type=="executable"', {
                   'VCLinkerTool': {
@@ skipping 208 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }