[chromecast] Do not link with -latomic

base/BUILD.gn

 # Copyright (c) 2013 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.
 
 # HOW TO WRITE CONDITIONALS IN THIS FILE
 # ======================================
 #
 # In many other places, one would write a conditional that expresses all the
 # cases when a source file is used or unused, and then either add or subtract
 # it from the sources list in that case
@@ skipping 1074 matching lines @@
   ]
 
   public_deps = [
     ":base_paths",
     ":base_static",
     ":build_date",
     ":debugging_flags",
   ]
 
   # Needed for <atomic> if using newer C++ library than sysroot
-  if (!use_sysroot && (is_android || is_linux)) {
+  if (!use_sysroot && (is_android || (is_linux && !is_chromecast))) {
     libs = [ "atomic" ]
   }
 
   if (use_experimental_allocator_shim) {
     # The allocator shim is part of the base API. This is to allow clients of
     # base should to install hooks into the allocator path.
     public_deps += [ "//base/allocator:unified_allocator_shim" ]
   }
 
   # Allow more direct string conversions on platforms with native utf8
@@ skipping 1459 matching lines @@
 }
 
 fuzzer_test("base_json_correctness_fuzzer") {
   sources = [
     "json/correctness_fuzzer.cc",
   ]
   deps = [
     ":base",
   ]
 }