The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f23b896efce3a6ea139d29efd791bc09974def9f

commit f23b896efce3a6ea139d29efd791bc09974def9f
Author: imcheng <imcheng@chromium.org>
Date: Mon Jul 10 23:01:56 2017

[MediaRouter] PresentationServiceDelegateImpl cleanup.

- Removed method declarations that are not defined.
- Removed PresentationFrameManager. There is not much reason to keep
  it since most of the logic is just delegating from PSDImpl.
- Push the URL validity check for screen availability to PSImpl.

BUG= 736557 

Review-Url: https://codereview.chromium.org/2958663002
Cr-Commit-Position: refs/heads/master@{#485437}

[modify] https://crrev.com/f23b896efce3a6ea139d29efd791bc09974def9f/chrome/browser/media/router/presentation_service_delegate_impl.cc
[modify] https://crrev.com/f23b896efce3a6ea139d29efd791bc09974def9f/chrome/browser/media/router/presentation_service_delegate_impl.h
[modify] https://crrev.com/f23b896efce3a6ea139d29efd791bc09974def9f/content/browser/presentation/presentation_service_impl.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/22578daaf51705107a2519f0209e9ceec3358a38

commit 22578daaf51705107a2519f0209e9ceec3358a38
Author: imcheng <imcheng@chromium.org>
Date: Tue Jul 11 23:09:11 2017

[Media Router] Move main frame check for SetDefaultPresentationUrls.

Move the check to PSImpl since we are already doing a main frame check
there and it's slightly simpler.

BUG= 736557 

Review-Url: https://codereview.chromium.org/2972933002
Cr-Commit-Position: refs/heads/master@{#485724}

[modify] https://crrev.com/22578daaf51705107a2519f0209e9ceec3358a38/chrome/browser/media/router/presentation_service_delegate_impl.cc
[modify] https://crrev.com/22578daaf51705107a2519f0209e9ceec3358a38/chrome/browser/media/router/presentation_service_delegate_impl.h
[modify] https://crrev.com/22578daaf51705107a2519f0209e9ceec3358a38/chrome/browser/media/router/presentation_service_delegate_impl_unittest.cc
[modify] https://crrev.com/22578daaf51705107a2519f0209e9ceec3358a38/content/browser/presentation/presentation_service_impl.cc
[modify] https://crrev.com/22578daaf51705107a2519f0209e9ceec3358a38/content/browser/presentation/presentation_service_impl.h
[modify] https://crrev.com/22578daaf51705107a2519f0209e9ceec3358a38/content/browser/presentation/presentation_service_impl_unittest.cc