Define default but still private MediaSession constructor

Source/modules/mediasession/MediaSession.h

Index: Source/modules/mediasession/MediaSession.h
diff --git a/Source/modules/mediasession/MediaSession.h b/Source/modules/mediasession/MediaSession.h
index 45ead4758948a136bf46414b8f7a8a7b6133496f..8d62a16696814ac373067508d22810581613ba54 100644
--- a/Source/modules/mediasession/MediaSession.h
+++ b/Source/modules/mediasession/MediaSession.h
@@ -21,7 +21,7 @@ public:
     DEFINE_INLINE_TRACE() { }
 
 private:
-    MediaSession();
+    MediaSession() { }

[whywhat, 2015/07/02 15:05:16]

 = default

[davve, 2015/07/02 15:19:53]

https://www.chromium.org/developers/coding-style/cpp-dos-and-donts#TOC-Stop-i...

was a good read. Thanks!

So you would recommend moving back the implementation to the .cpp file and use
'= default' there?

[whywhat, 2015/07/02 15:33:50]

As I understand, you either leave it as it was (empty implementation in .cpp
file) or use '= default' in the header which is not the same as inlining so the
forward declaration example would compile.

[mlamouri (slow - plz ping), 2015/07/02 17:28:55]

+1 for using "= default". lgtm with that.

 };
 
 } // namespace blink