Lint enabled for webrtc/modules/video_coding folder.

webrtc/modules/video_coding/codecs/vp9/vp9_impl.h

Index: webrtc/modules/video_coding/codecs/vp9/vp9_impl.h
diff --git a/webrtc/modules/video_coding/codecs/vp9/vp9_impl.h b/webrtc/modules/video_coding/codecs/vp9/vp9_impl.h
index 91475c9e82f380a87f4ca0415a013995aa98139a..bfa45403041140e2925bfa58d708cb3855b1d64c 100644
--- a/webrtc/modules/video_coding/codecs/vp9/vp9_impl.h
+++ b/webrtc/modules/video_coding/codecs/vp9/vp9_impl.h
@@ -9,8 +9,10 @@
  *
  */
 
-#ifndef WEBRTC_MODULES_VIDEO_CODING_CODECS_VP9_IMPL_H_
-#define WEBRTC_MODULES_VIDEO_CODING_CODECS_VP9_IMPL_H_
+#ifndef WEBRTC_MODULES_VIDEO_CODING_CODECS_VP9_VP9_IMPL_H_
+#define WEBRTC_MODULES_VIDEO_CODING_CODECS_VP9_VP9_IMPL_H_
+
+#include <vector>
 
 #include "webrtc/modules/video_coding/codecs/vp9/include/vp9.h"
 #include "webrtc/modules/video_coding/codecs/vp9/vp9_frame_buffer_pool.h"
@@ -129,7 +131,6 @@ class VP9EncoderImpl : public VP9Encoder {
   rtc::scoped_ptr<ScreenshareLayersVP9> spatial_layer_;
 };
 
-
 class VP9DecoderImpl : public VP9Decoder {
  public:
   VP9DecoderImpl();
@@ -165,4 +166,4 @@ class VP9DecoderImpl : public VP9Decoder {
 };
 }  // namespace webrtc
 
-#endif  // WEBRTC_MODULES_VIDEO_CODING_CODECS_VP9_IMPL_H_
+#endif  // WEBRTC_MODULES_VIDEO_CODING_CODECS_VP9_VP9_IMPL_H_