Update from https://crrev.com/333737

build/config/sanitizers/BUILD.gn

Index: build/config/sanitizers/BUILD.gn
diff --git a/build/config/sanitizers/BUILD.gn b/build/config/sanitizers/BUILD.gn
index 3972a5c0e3b5e65b9ce25ab2081cef1577c49f47..023315f12bd45293f71678dd27e117c74ad697c6 100644
--- a/build/config/sanitizers/BUILD.gn
+++ b/build/config/sanitizers/BUILD.gn
@@ -2,23 +2,41 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-# Contains the dependencies needed for asan to link into executables and
+import("//build/config/sanitizers/sanitizers.gni")
+
+# Contains the dependencies needed for sanitizers to link into executables and
 # shared_libraries. Unconditionally depend upon this target as it is empty if
-# |is_asan| is false.
+# |is_asan|, |is_lsan|, |is_tsan|, |is_msan| and |use_custom_libcxx| are false.
 group("deps") {
-  if (is_asan) {
+  # TODO(vtl): Chromium has the following (but we don't have
+  # instrumented_libraries).
+  # deps = [
+  #   "//third_party/instrumented_libraries:deps",
+  # ]
+  deps = []
+  if (is_asan || is_lsan || is_tsan || is_msan) {
     public_configs = [ ":sanitizer_options_link_helper" ]
-    deps = [
-      ":options_sources",
-    ]
+    deps += [ ":options_sources" ]
+  }
+  if (use_custom_libcxx) {
+    deps += [ "//buildtools/third_party/libc++:libcxx_proxy" ]
   }
 }
 
 config("sanitizer_options_link_helper") {
-  ldflags = [
-    "-Wl,-u_sanitizer_options_link_helper",
-    "-fsanitize=address",
-  ]
+  ldflags = [ "-Wl,-u_sanitizer_options_link_helper" ]
+  if (is_asan) {
+    ldflags += [ "-fsanitize=address" ]
+  }
+  if (is_lsan) {
+    ldflags += [ "-fsanitize=leak" ]
+  }
+  if (is_tsan) {
+    ldflags += [ "-fsanitize=thread" ]
+  }
+  if (is_msan) {
+    ldflags += [ "-fsanitize=memory" ]
+  }
 }
 
 source_set("options_sources") {
@@ -34,6 +52,10 @@ source_set("options_sources") {
     sources += [ "//build/sanitizers/asan_suppressions.cc" ]
   }
 
+  if (is_lsan) {
+    sources += [ "//build/sanitizers/lsan_suppressions.cc" ]
+  }
+
   if (is_tsan) {
     sources += [ "//build/sanitizers/tsan_suppressions.cc" ]
   }