media-internals: Differentiate error, info, and debug log messages

media/base/test_helpers.cc

Index: media/base/test_helpers.cc
diff --git a/media/base/test_helpers.cc b/media/base/test_helpers.cc
index d29d6329e837e16d3f20494b305b2200381c1d49..60e22dfab533eca9abeba44e09c6549d146879f9 100644
--- a/media/base/test_helpers.cc
+++ b/media/base/test_helpers.cc
@@ -260,4 +260,10 @@ void CallbackPairChecker::RecordBCalled() {
   expecting_b_ = false;
 }
 
+void AddLogEntryForTest(MediaLog::MediaLogLevel level,
+                        const std::string& message) {
+  DVLOG(1) << "Media log (" << MediaLog::MediaLogLevelToString(level)
+           << "): " << message;
+}
+
 }  // namespace media