Separate out GN sanitizer flags.

build/config/compiler/BUILD.gn

Index: build/config/compiler/BUILD.gn
diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index 74dec11c3b8b645c5030e3925a0ce950d7167e6e..53ca6cb6e8ce3eae33d4c9497d0257a1c49c51b1 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -144,106 +144,6 @@ config("compiler") {
       # TODO(jochen): Enable this on chromeos on arm. http://crbug.com/356580
       ldflags += [ "-Wl,--fatal-warnings" ]
     }
-
-    # Common options for AddressSanitizer, LeakSanitizer, ThreadSanitizer,
-    # MemorySanitizer and non-official CFI builds.
-    if (using_sanitizer || (is_cfi && !is_official_build)) {
-      cflags += [
-        "-fno-omit-frame-pointer",
-        "-gline-tables-only",
-      ]
-    }
-    if (is_asan) {
-      asan_blacklist_path =
-          rebase_path("//tools/memory/asan/blacklist.txt", root_build_dir)
-      cflags += [
-        "-fsanitize=address",
-        "-fsanitize-blacklist=$asan_blacklist_path",
-      ]
-      if (is_mac) {
-        cflags += [ "-mllvm -asan-globals=0" ]  # http://crbug.com/352073
-        # TODO(GYP): deal with mac_bundles.
-      }
-    }
-    if (is_lsan) {
-      cflags += [ "-fsanitize=leak" ]
-    }
-    if (is_tsan) {
-      tsan_blacklist_path =
-          rebase_path("//tools/memory/tsan_v2/ignores.txt", root_build_dir)
-      cflags += [
-        "-fsanitize=thread",
-        "-fsanitize-blacklist=$tsan_blacklist_path",
-      ]
-    }
-    if (is_msan) {
-      msan_blacklist_path =
-          rebase_path("//tools/msan/blacklist.txt", root_build_dir)
-      cflags += [
-        "-fsanitize=memory",
-        "-fsanitize-memory-track-origins=$msan_track_origins",
-        "-fsanitize-blacklist=$msan_blacklist_path",
-      ]
-    }
-    if (is_cfi && !is_nacl) {
-      cfi_blacklist_path =
-          rebase_path("//tools/cfi/blacklist.txt", root_build_dir)
-      cflags += [
-        "-flto",
-        "-fsanitize=cfi-vcall",
-        "-fsanitize=cfi-derived-cast",
-        "-fsanitize=cfi-unrelated-cast",
-        "-fsanitize-blacklist=$cfi_blacklist_path",
-      ]
-      ldflags += [
-        "-flto",
-        "-fsanitize=cfi-vcall",
-        "-fsanitize=cfi-derived-cast",
-        "-fsanitize=cfi-unrelated-cast",
-      ]
-
-      # Apply a lower LTO optimization level in non-official builds.
-      if (!is_official_build) {
-        if (is_linux) {
-          ldflags += [ "-Wl,-plugin-opt,O1" ]
-        } else if (is_mac) {
-          ldflags += [ "-Wl,-mllvm,-O1" ]
-        }
-      }
-
-      # Work-around for http://openradar.appspot.com/20356002
-      if (is_mac) {
-        ldflags += [ "-Wl,-all_load" ]
-      }
-
-      # Without this flag, LTO produces a .text section that is larger
-      # than the maximum call displacement, preventing the linker from
-      # relocating calls (http://llvm.org/PR22999).
-      if (current_cpu == "arm") {
-        ldflags += [ "-Wl,-plugin-opt,-function-sections" ]
-      }
-
-      if (use_cfi_diag) {
-        cflags += [
-          "-fno-sanitize-trap=cfi",
-          "-fsanitize-recover=cfi",
-        ]
-        ldflags += [
-          "-fno-sanitize-trap=cfi",
-          "-fsanitize-recover=cfi",
-        ]
-      } else {
-        defines += [ "CFI_ENFORCEMENT" ]
-      }
-    }
-
-    if (use_custom_libcxx) {
-      cflags_cc += [ "-nostdinc++" ]
-      include_dirs = [
-        "//buildtools/third_party/libc++/trunk/include",
-        "//buildtools/third_party/libc++abi/trunk/include",
-      ]
-    }
   }
 
   if (is_clang && is_debug) {