Add gtest as a dependency for neteq_quality_test_support.

webrtc/modules/audio_coding/neteq/neteq_tests.gypi

 # Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 {
   'conditions': [
@@ skipping 156 matching lines @@
         'tools/neteq_external_decoder_test.h',
         'tools/neteq_performance_test.cc',
         'tools/neteq_performance_test.h',
       ],
     }, # neteq_test_support
 
     {
       'target_name': 'neteq_quality_test_support',
       'type': 'static_library',
       'dependencies': [
+        '<(DEPTH)/testing/gtest.gyp:gtest',
         '<(DEPTH)/third_party/gflags/gflags.gyp:gflags',
         'neteq',
         'neteq_unittest_tools',
       ],
       'sources': [
         'tools/neteq_quality_test.cc',
         'tools/neteq_quality_test.h',
       ],
     }, # neteq_test_support
 
@@ skipping 115 matching lines @@
         'test/NETEQTEST_RTPpacket.cc',
         'test/NETEQTEST_RTPpacket.h',
       ],
       # Disable warnings to enable Win64 build, issue 1323.
       'msvs_disabled_warnings': [
         4267,  # size_t to int truncation.
       ],
     },
   ], # targets
 }