GN: Fix test_support_unittests and MIPS compile issue.

webrtc/modules/video_coding/codecs/vp8/vp8.gyp

 # 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.
 
 {
   'includes': [
@@ skipping 40 matching lines @@
   ], # targets
   'conditions': [
     ['include_tests==1', {
       'targets': [
         {
           'target_name': 'vp8_coder',
           'type': 'executable',
           'dependencies': [
             'webrtc_vp8',
             '<(webrtc_root)/common_video/common_video.gyp:common_video',
-            '<(webrtc_root)/test/metrics.gyp:metrics',
             '<(DEPTH)/testing/gtest.gyp:gtest',
             '<(webrtc_root)/system_wrappers/system_wrappers.gyp:system_wrappers',
             '<(webrtc_root)/test/test.gyp:test_support_main',
             '<(webrtc_root)/tools/internal_tools.gyp:command_line_parser',
           ],
           'sources': [
             'vp8_sequence_coder.cc',
           ],
         },
       ], # targets
     }], # include_tests
   ],
 }