GN(android): Fix up support for is_asan=true

build/config/android/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/config/android/config.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/sysroot.gni")
 
 assert(is_android)
 
@@ skipping 24 matching lines @@
         rebase_path(android_toolchain_root, root_build_dir)
     if (current_cpu == "arm") {
       cflags += [
         # TODO(hans) Enable integrated-as (crbug.com/124610).
         "-no-integrated-as",
         "-B${rebased_android_toolchain_root}/bin",  # Else /usr/bin/as gets picked up.
       ]
     }
   }
 
-  if (is_asan) {
-    # Android build relies on -Wl,--gc-sections removing unreachable code.
-    # ASan instrumentation for globals inhibits this and results in a library
-    # with unresolvable relocations.
-    # TODO(eugenis): find a way to reenable this.
-    cflags += [ "-mllvm -asan-globals=0" ]
-  }
-
   # Use gold for Android for most CPU architectures.
   if (current_cpu == "x86" || current_cpu == "x64" || current_cpu == "arm") {
     ldflags += [ "-fuse-ld=gold" ]
     if (is_clang) {
       # Let clang find the ld.gold in the NDK.
       ldflags += [ "--gcc-toolchain=$rebased_android_toolchain_root" ]
     }
 
     # Use -mstackrealign due to a bug on ia32 Jelly Bean.
     # See crbug.com/521527
@@ skipping 170 matching lines @@
 
     # Avoid errors with current NDK:
     # "third_party/android_tools/ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/include/arm_neon.h:3426:3: error: argument must be a constant"
     "-finstrument-functions-exclude-file-list=arm_neon.h,SaturatedArithmeticARM.h",
   ]
   defines = [ "CYGPROFILE_INSTRUMENTATION=1" ]
 }
 
 config("no_cygprofile_instrumentation") {
 }