Enable cpplint in media/

Bug: webrtc:5584
Change-Id: I2fd1395d35596d9002e19cc90fcda3a5d4cde9e7
Reviewed-on: https://webrtc-review.googlesource.com/16564
Commit-Queue: Steve Anton <steveanton@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20504}
diff --git a/media/engine/webrtcmediaengine.cc b/media/engine/webrtcmediaengine.cc
index 2a79c6b..b82b279 100644
--- a/media/engine/webrtcmediaengine.cc
+++ b/media/engine/webrtcmediaengine.cc
@@ -11,6 +11,9 @@
 #include "media/engine/webrtcmediaengine.h"
 
 #include <algorithm>
+#include <memory>
+#include <tuple>
+#include <utility>
 
 #include "api/audio_codecs/builtin_audio_decoder_factory.h"
 #include "api/audio_codecs/builtin_audio_encoder_factory.h"