Clean up WebSourceBufferClient interface

third_party/WebKit/public/platform/WebSourceBufferClient.h

Index: third_party/WebKit/public/platform/WebSourceBufferClient.h
diff --git a/third_party/WebKit/public/platform/WebSourceBufferClient.h b/third_party/WebKit/public/platform/WebSourceBufferClient.h
index dccfcc87b804d5957eea61231c7f17cf1e38e2bb..2b5066971832808aaa18fd28e05869053f472d1e 100644
--- a/third_party/WebKit/public/platform/WebSourceBufferClient.h
+++ b/third_party/WebKit/public/platform/WebSourceBufferClient.h
@@ -7,9 +7,7 @@
 
 #include "WebMediaPlayer.h"
 #include "WebString.h"
-
-#include <tuple>
-#include <vector>
+#include "WebVector.h"
 
 namespace blink {
 
@@ -18,12 +16,18 @@ public:
     virtual ~WebSourceBufferClient() { }
 
     // Complete media track info: track type, bytestream id, kind, label, language.
-    typedef std::tuple<WebMediaPlayer::TrackType, WebString, WebString, WebString, WebString> MediaTrackInfo;
+    struct MediaTrackInfo {
+        WebMediaPlayer::TrackType trackType;
+        WebString byteStreamTrackId;
+        WebString kind;
+        WebString label;
+        WebString language;
+    };
 
     // Notifies SourceBuffer that parsing of a new init segment has been completed successfully. The input parameter is a collection
     // of information about media tracks found in the new init segment. The return value is a vector of blink WebMediaPlayer track ids
     // assigned to each track of the input collection (the order of output track ids must match the input track information).
-    virtual std::vector<WebMediaPlayer::TrackId> initializationSegmentReceived(const std::vector<MediaTrackInfo>& tracks) = 0;
+    virtual WebVector<WebMediaPlayer::TrackId> initializationSegmentReceived(const WebVector<MediaTrackInfo>& tracks) = 0;
 };
 
 } // namespace blink