Move audioproc_test_utils into enable_protobuf condition.

From https://codereview.webrtc.org/1409943002 this target doesn't
pass GYP on iOS unless build_with_libjingle==1.
Our bots currently build with that, but we want to remove that GYP_DEFINES
from the bots since http://www.webrtc.org/native-code/ios doesn't
say it's needed.

R=aluebs@webrtc.org

Review URL: https://codereview.webrtc.org/1419533010 .

Cr-Commit-Position: refs/heads/master@{#10510}
diff --git a/webrtc/modules/audio_processing/audio_processing_tests.gypi b/webrtc/modules/audio_processing/audio_processing_tests.gypi
index b301b00..536649d 100644
--- a/webrtc/modules/audio_processing/audio_processing_tests.gypi
+++ b/webrtc/modules/audio_processing/audio_processing_tests.gypi
@@ -9,21 +9,6 @@
 {
   'targets': [
     {
-      'target_name': 'audioproc_test_utils',
-      'type': 'static_library',
-      'dependencies': [
-        'audioproc_debug_proto',
-        '<(webrtc_root)/base/base.gyp:rtc_base_approved',
-        '<(webrtc_root)/common_audio/common_audio.gyp:common_audio',
-      ],
-      'sources': [
-        'test/audio_file_processor.cc',
-        'test/audio_file_processor.h',
-        'test/test_utils.cc',
-        'test/test_utils.h',
-      ],
-    },
-    {
       'target_name': 'transient_suppression_test',
       'type': 'executable',
       'dependencies': [
@@ -81,6 +66,21 @@
     ['enable_protobuf==1', {
       'targets': [
         {
+          'target_name': 'audioproc_test_utils',
+          'type': 'static_library',
+          'dependencies': [
+            'audioproc_debug_proto',
+            '<(webrtc_root)/base/base.gyp:rtc_base_approved',
+            '<(webrtc_root)/common_audio/common_audio.gyp:common_audio',
+          ],
+          'sources': [
+            'test/audio_file_processor.cc',
+            'test/audio_file_processor.h',
+            'test/test_utils.cc',
+            'test/test_utils.h',
+          ],
+        },
+        {
           'target_name': 'audioproc_unittest_proto',
           'type': 'static_library',
           'sources': [ 'test/unittest.proto', ],