Delete the GTK+ port of Chrome.

chrome/app/chrome_exe_main_gtk.cc

-// Copyright (c) 2012 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.
-
-#include "build/build_config.h"
-#include "chrome/browser/first_run/upgrade_util.h"
-#include "components/startup_metric_utils/startup_metric_utils.h"
-
-// The entry point for all invocations of Chromium, browser and renderer. On
-// windows, this does nothing but load chrome.dll and invoke its entry point in
-// order to make it easy to update the app from GoogleUpdate. We don't need
-// that extra layer with on linux.
-
-#if defined(ADDRESS_SANITIZER) && defined(GOOGLE_CHROME_BUILD)
-// Default AddressSanitizer options for the official build. These do not affect
-// tests or non-official Chromium builds.
-//  - disable the strict memcmp() checking (http://crbug.com/178677 and
-//    http://crbug.com/178404).
-//  - set the malloc_context_size (i.e. the size of stack traces collected by
-//    ASan for each malloc/free) to 5. These stack traces tend to accumulate
-//    very fast in applications using JIT (v8 in Chrome's case), see
-//    https://code.google.com/p/address-sanitizer/issues/detail?id=177
-//  - disable the in-process symbolization, which isn't 100% compatible with
-//    the existing sandboxes and doesn't make much sense for stripped official
-//    binaries.
-const char *kAsanDefaultOptions =
-    "malloc_context_size=5 strict_memcmp=0 symbolize=false";
-
-// Override the default ASan options for the Google Chrome executable.
-// __asan_default_options should not be instrumented, because it is called
-// before ASan is initialized.
-extern "C"
-__attribute__((no_sanitize_address))
-const char *__asan_default_options() {
-  return kAsanDefaultOptions;
-}
-#endif
-
-extern "C" {
-int ChromeMain(int argc, const char** argv);
-}
-
-int main(int argc, const char** argv) {
-  startup_metric_utils::RecordExeMainEntryTime();
-  int return_code = ChromeMain(argc, argv);
-
-#if defined(OS_LINUX)
-  // Launch a new instance if we're shutting down because we detected an
-  // upgrade in the persistent mode.
-  upgrade_util::RelaunchChromeBrowserWithNewCommandLineIfNeeded();
-#endif
-
-  return return_code;
-}