Fix removal of unreferenced ASAN API functions

build/config/sanitizers/BUILD.gn

 # Copyright 2014 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_overrides/build.gni")
 import("//build/config/chrome_build.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/clang/clang.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/toolchain/toolchain.gni")
@@ skipping 326 matching lines @@
     }
   }
 }
 
 config("link_executable") {
   if (is_asan && is_win && !is_component_build) {
     if (target_cpu == "x64") {
       # Windows 64-bit. TODO(etienneb): Remove the assert when this is ready.
       assert(false, "win/asan does not work in 64-bit yet")
       libs = [ "clang_rt.asan-x86_64.lib" ]
+      ldflags = [ "-wholearchive:clang_rt.asan-x86_64.lib" ]
     } else {
       assert(target_cpu == "x86", "WinASan unsupported architecture")
       libs = [ "clang_rt.asan-i386.lib" ]
+      ldflags = [ "-wholearchive:clang_rt.asan-i386.lib" ]
     }
   }
 }
 
 config("link_shared_library") {
   if (is_asan && is_win && !is_component_build) {
     if (target_cpu == "x64") {
       # Windows 64-bit. TODO(etienneb): Remove the assert when this is ready.
       assert(false, "win/asan does not work in 64-bit yet")
       libs = [ "clang_rt.asan_dll_thunk-x86_64.lib" ]
@@ skipping 206 matching lines @@
 # This allows to selectively disable ubsan_vptr, when needed. In particular,
 # if some third_party code is required to be compiled without rtti, which
 # is a requirement for ubsan_vptr.
 config("default_sanitizer_flags_but_ubsan_vptr") {
   configs = all_sanitizer_configs - [ ":ubsan_vptr_flags" ]
 }
 
 config("default_sanitizer_flags_but_coverage") {
   configs = all_sanitizer_configs - [ ":coverage_flags" ]
 }