Cleaning neteq_unittest resource files.

BUG=webrtc:2692

Review URL: https://codereview.webrtc.org/1563983003

Cr-Commit-Position: refs/heads/master@{#11189}
diff --git a/webrtc/modules/audio_coding/neteq/neteq_unittest.cc b/webrtc/modules/audio_coding/neteq/neteq_unittest.cc
index a6b9388..a20d712 100644
--- a/webrtc/modules/audio_coding/neteq/neteq_unittest.cc
+++ b/webrtc/modules/audio_coding/neteq/neteq_unittest.cc
@@ -524,8 +524,8 @@
 #define MAYBE_TestBitExactness DISABLED_TestBitExactness
 #endif
 TEST_F(NetEqDecodingTest, MAYBE_TestBitExactness) {
-  const std::string input_rtp_file = webrtc::test::ProjectRootPath() +
-      "resources/audio_coding/neteq_universal_new.rtp";
+  const std::string input_rtp_file =
+      webrtc::test::ResourcePath("audio_coding/neteq_universal_new", "rtp");
   // Note that neteq4_universal_ref.pcm and neteq4_universal_ref_win_32.pcm
   // are identical. The latter could have been removed, but if clients still
   // have a copy of the file, the test will fail.