Fix missing symbols for pre-linking of the Cast sender library for iOS.

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.
 
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
@@ skipping 302 matching lines @@
     "message_loop/message_pump_io_ios.cc",
     "message_loop/message_pump_io_ios.h",
     "message_loop/message_pump_libevent.cc",
     "message_loop/message_pump_libevent.h",
     "message_loop/message_pump_mac.h",
     "message_loop/message_pump_mac.mm",
     "message_loop/message_pump_win.cc",
     "message_loop/message_pump_win.h",
     "move.h",
     "native_library.h",
+    "native_library_ios.mm",
     "native_library_mac.mm",
     "native_library_posix.cc",
     "native_library_win.cc",
     "nix/mime_util_xdg.cc",
     "nix/mime_util_xdg.h",
     "nix/xdg_util.cc",
     "nix/xdg_util.h",
     "numerics/safe_conversions.h",
     "numerics/safe_conversions_impl.h",
     "numerics/safe_math.h",
@@ skipping 1128 matching lines @@
 
   # GYP: //base.gyp:base_java_unittest_support
   android_library("base_java_unittest_support") {
     deps = [
       ":base_java",
     ]
     java_files =
         [ "test/android/java/src/org/chromium/base/ContentUriTestUtils.java" ]
   }
 }