Print some output in long perf tests, to keep them alive

webrtc/video/full_stack.cc

Index: webrtc/video/full_stack.cc
diff --git a/webrtc/video/full_stack.cc b/webrtc/video/full_stack.cc
index 008116cc7007bf08e47b1af934566a533bf09cbb..7768575c873febea1899b8aa9ba5495cd1dc9777 100644
--- a/webrtc/video/full_stack.cc
+++ b/webrtc/video/full_stack.cc
@@ -222,6 +222,7 @@ class VideoAnalyzer : public PacketReceiver,
 
     int last_frames_processed = -1;
     EventTypeWrapper eventType;
+    int iteration = 0;
     while ((eventType = done_->Wait(FullStackTest::kDefaultTimeoutMs)) !=
            kEventSignaled) {
       int frames_processed;
@@ -231,6 +232,14 @@ class VideoAnalyzer : public PacketReceiver,
       }
       if (last_frames_processed == -1) {
         last_frames_processed = frames_processed;
+
+        // Print some output so test infrastructure won't think we've crashed.
+        const char* kKeepAliveMessages[3] = {
+            "Uh, I'm-I'm not quite dead, sir.",

[pbos-webrtc, 2015/08/31 12:30:27]

Wat? Where should this really be? This should be called every nth frame, right?

[sprang_webrtc, 2015/08/31 13:05:17]

This should be called for every timeout (kDefaultTimeoutMs = 30s).
Moved to before this if-statement...

+            "Uh, I-I think uh, I could pull through, sir.",
+            "Actually, I think I'm all right to come with you--"};
+        printf("%s\n", kKeepAliveMessages[iteration++ % 3]);
+
         continue;
       }
       ASSERT_GT(frames_processed, last_frames_processed)
@@ -238,6 +247,8 @@ class VideoAnalyzer : public PacketReceiver,
       last_frames_processed = frames_processed;
     }
 
+    printf("Farewell, sweet Concorde!\n");
+
     // Signal stats polling thread if that is still waiting and stop it now,
     // since it uses the send_stream_ reference that might be reclaimed after
     // returning from this method.