Make audio quality test upload if PESQ score is sufficiently bad.

R=guidou

Bug: 767857
Change-Id: I1a3aa68c3a6996c17bc9d0b96595736e4fb453ab
Reviewed-on: https://chromium-review.googlesource.com/741598
Commit-Queue: Patrik Höglund <phoglund@chromium.org>
Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#512860}

chrome/browser/media/webrtc/webrtc_audio_quality_browsertest.cc

@@ -411,9 +411,16 @@ class MAYBE_WebRtcAudioQualityBrowserTest : public WebRtcTestBase {
                              "score", true);
     }
 
+    if (CanParseAsFloat(mos_lqo) && atof(mos_lqo.c_str()) < 3.0f) {
+      // If we keep the recordings, it's possible for the WebRTC bot recipes to
+      // upload them and make them available on the build.
+      printf("Suspiciously low MOS-LQO score: keeping recordings...\n");
+      return;
+    } else {
       DeleteFileUnlessTestFailed(trimmed_reference, false);
       DeleteFileUnlessTestFailed(trimmed_recording, false);
     }
+  }
 
   bool CanParseAsFloat(const std::string& value) {
     return atof(value.c_str()) != 0 || value == "0";
@@ -464,7 +471,7 @@ class MAYBE_WebRtcAudioQualityBrowserTest : public WebRtcTestBase {
     if (anchor_pos == std::string::npos) {
       LOG(ERROR)
           << "PESQ was not able to compute a score; we probably recorded "
-          << "only silence. Please check the output/input volume levels.";
+          << "only silence.";
       return false;
     }