Fixed_#3571_seekRange().start is going back and forth while start-over

[pulkit-30]

Fixes #3571

Description

Added a new get function getSeekRangeStartTime() in lib/media/presentation_timeline.js .
And changed the function to call getSeekRangeStartTime() instead of getSeekRangeStart() in lib/player.js.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to
  not work as expected)
• This change requires a documentation update

Checklist:

• I have signed the Google CLA https://cla.developers.google.com
• My code follows the style guidelines of this project
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have verified my change on multiple browsers on different platforms
• I have run ./build/all.py and the build passes
• I have run ./build/test.py and all tests pass

Please provide me appropriate feedback/review so that I can continue working on this.

[pulkit-30]

@joeyparrish Please provide me with appropriate feedback/review so that I can continue working on this.

[joeyparrish]

I'm not convinced this is correct for live streams. What content have you tested it on?

[pulkit-30]

Thanks for your suggestion @joeyparrish. This didn't strike my mind previously. Perhaps my patch won't work with streams. Do you have any idea of how can I make it compatible with streams?

[joeyparrish]

You'll need to test this with live streams. We have plenty in the demo app.

[avelad]

@pulkit-30 have you been able to test with live streams?

[avelad]

Closing due to inactivity.