GN: Implement is_lsan, is_tsan and is_msan.

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 0e28e7da8be6dce3e5b5d93500416c894b8513cd..2ef116ce87df01b155b99fe7cb240cd45b31bcd3 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -139,12 +139,36 @@ config("compiler") {
       ]
     }
     if (is_asan) {
-      cflags += [ "-fsanitize=address" ]
+      asan_blacklist_path = rebase_path(asan_blacklist, root_build_dir)
+      cflags += [
+        "-fsanitize=address",
+        "-fsanitize-blacklist=$asan_blacklist_path",
+      ]
       if (is_mac) {
         cflags += [ "-mllvm -asan-globals=0" ]  # http://crbug.com/352073
         # TODO(GYP): deal with mac_bundles.
       }
     }
+    if (is_lsan) {
+      cflags += [ "-fsanitize=leak" ]
+    }
+    if (is_tsan) {
+      tsan_blacklist_path = rebase_path(tsan_blacklist, root_build_dir)
+      cflags += [
+        "-fsanitize=thread",
+        "-fsanitize-blacklist=$tsan_blacklist_path",
+      ]
+    }
+    if (is_msan) {
+      msan_blacklist_path = rebase_path(msan_blacklist, root_build_dir)
+      cflags += [
+        "-fsanitize=memory",
+        "-fsanitize-memory-track-origins=$msan_track_origins",
+        "-fsanitize-blacklist=$msan_blacklist_path",
+      ]
+
+      # TODO(GYP): Support instrumented libraries and custom libc++.
+    }
   }
 
   if (is_clang && is_debug) {