Convert seeking implementation to currentTime

Instead of listening for the seeking event, override the currentTime implementation on the tech. Update the tests.

@@ -190,13 +190,19 @@ var
       updateDuration;
 
 
-    player.on('seeking', function() {
-      var currentTime = player.currentTime();
-      player.hls.mediaIndex = getMediaIndexByTime(player.hls.playlists.media(),
-                                                  currentTime);
+    player.hls.currentTime = function(currentTime) {
+      if (currentTime === undefined) {
+        return this.el().vjs_getProperty('currentTime');
+      }
+
+      if (!(this.playlists && this.playlists.media())) {
+        return 0;
+      }
+      this.mediaIndex =
+          getMediaIndexByTime(this.playlists.media(), currentTime);
 
       // abort any segments still being decoded
-      player.hls.sourceBuffer.abort();
+      this.sourceBuffer.abort();
 
       // cancel outstanding requests and buffer appends
       if (segmentXhr) {
@@ -205,7 +211,7 @@ var
 
       // begin filling the buffer at the new position
       fillBuffer(currentTime * 1000);
-    });
+    };
 
     /**
      * Update the player duration

@@ -754,7 +754,7 @@ test('cancels outstanding XHRs when seeking', function() {
   // trigger a segment download request
   player.trigger('timeupdate');
   // attempt to seek while the download is in progress
-  player.trigger('seeking');
+  player.hls.currentTime(7);
 
   ok(requests[1].aborted, 'XHR aborted');
   strictEqual(requests.length, 3, 'opened new XHR');
@@ -830,10 +830,7 @@ test('drops tags before the target timestamp when seeking', function() {
       bytes: i
     });
   }
-  player.currentTime = function() {
-    return 7;
-  };
-  player.trigger('seeking');
+  player.hls.currentTime(7);
   standardXHRResponse(requests[2]);
 
   while (callbacks.length) {
@@ -879,10 +876,7 @@ test('clears pending buffer updates when seeking', function() {
 
   // seek to 7s
   tags.push({ pts: 7000, bytes: 7 });
-  player.currentTime = function() {
-    return 7;
-  };
-  player.trigger('seeking');
+  player.hls.currentTime(7);
   standardXHRResponse(requests[2]);
 
   while (callbacks.length) {