[sqlite] Respect the gyp and gn component switch.

sql/BUILD.gn

 # Copyright 2014 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("//testing/test.gni")
 
 component("sql") {
   sources = [
     "connection.cc",
     "connection.h",
     "error_delegate_util.cc",
     "error_delegate_util.h",
     "init_status.h",
     "meta_table.cc",
     "meta_table.h",
-    "proxy.cc",
-    "proxy.h",
     "recovery.cc",
     "recovery.h",
     "statement.cc",
     "statement.h",
     "transaction.cc",
     "transaction.h",
   ]
 
   # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
@@ skipping 97 matching lines @@
   #'target_name': 'sql_unittests_apk',
   #'type': 'none',
   #'dependencies': [
   #  'sql_unittests',
   #],
   #'variables': {
   #  'test_suite_name': 'sql_unittests',
   #},
   #'includes': [ '../build/apk_test.gypi' ],
 }