gn: Add chromium_builder_asan target.

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 1d9c449e0b04fc563546df703b5b474977b2f8ee..8ea559a16f918b69448eb92673d253809c9a08f0 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -14,6 +14,7 @@ import("//build/config/ui.gni")
 import("//build_overrides/v8.gni")
 import("//media/media_options.gni")
 import("//third_party/openh264/openh264_args.gni")
+import("//tools/ipc_fuzzer/ipc_fuzzer.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
@@ -901,6 +902,47 @@ group("chromium_builder_perf") {
   }
 }
 
+if (!is_ios && !is_android && !is_chromecast) {
+  group("chromium_builder_asan") {
+    testonly = true
+
+    deps = [
+      "//chrome:chrome",
+      "//content/shell:content_shell",
+      "//v8:d8",
+    ]
+    if (!is_win) {
+      deps += [
+        "//net:dns_fuzz_stub",
+        "//net:hpack_fuzz_wrapper",
+        "//skia:filter_fuzz_stub",
+      ]
+    }
+    if (enable_ipc_fuzzer && !is_component_build) {
+      deps += [ "//tools/ipc_fuzzer:ipc_fuzzer_all" ]
+    }
+    if (!is_chromeos) {
+      deps += [
+        "//third_party/pdfium/samples:pdfium_test",
+        "//v8:v8_shell($host_toolchain)",
+      ]
+    }
+    if (is_clang) {
+      deps += [ "//build/sanitizers:copy_llvm_symbolizer" ]
+    }
+    if (is_win && symbol_level == 2 && target_cpu == "x86" && is_syzyasan) {
+      deps += [
+        "//chrome/tools/build/win/syzygy:chrome_dll_syzygy",
+        # TODO(GYP): Add this once it exists, https://crbug.com/619086
+        # "//content/shell:content_shell_syzyasan
+      ]
+      if (is_multi_dll_chrome) {
+        deps += [ "//chrome/tools/build/win/syzygy:chrome_child_dll_syzygy" ]
+      }
+    }
+  }
+}
+
 # For compatibility with GYP. The linux_chromium_chromeos_rel_ng and
 # linux_chromium_chromeos_compile_rel_ng bots reference this target as
 # something to build, but all targets for those bots to compile are set