revert changes in gap jumping controller

lib/media/gap_jumping_controller.js

@@ -61,9 +61,6 @@ shaka.media.GapJumpingController = class {
     /** @private {boolean} */
     this.didFireLargeGap_ = false;
 
-    /** @private {number} */
-    this.lastJumpTimestamp_ = 0;
-
     /**
      * The stall detector tries to keep the playhead moving forward. It is
      * managed by the gap-jumping controller to avoid conflicts. On some
@@ -77,10 +74,6 @@ shaka.media.GapJumpingController = class {
     this.hadSegmentAppended_ = false;
 
     this.eventManager_.listen(video, 'waiting', () => this.onPollGapJump_());
-    this.eventManager_.listen(video, 'playing',
-        () => {
-          this.lastJumpTimestamp_ = Date.now();
-        });
 
     /**
      * We can't trust |readyState| or 'waiting' events on all platforms. To make
@@ -150,10 +143,6 @@ shaka.media.GapJumpingController = class {
     if (this.video_.readyState == 0) {
       return;
     }
-    // Don't gap jump if the last jump was too recent.
-    if (Date.now() - this.lastJumpTimestamp_ < 5000) {
-      return;
-    }
     // Do not gap jump if seeking has begun, but the seeking event has not
     // yet fired for this particular seek.
     if (this.video_.seeking) {
@@ -252,7 +241,6 @@ shaka.media.GapJumpingController = class {
             'Jumping forward', jumpSize, 'seconds because of gap starting at',
             buffered.end(gapIndex - 1), 'and ending at', jumpTo);
       }
-      this.lastJumpTimestamp_ = Date.now();
       this.video_.currentTime = jumpTo;
     }
   }