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This reverts commit b0ec93f6.

Reason for revert: https://bugs.chromium.org/p/chromium/issues/detail?id=812423

Original change's description:
> Remove kHaveFutureData restriction from play state notifications.
> 
> This reland marks media-src-suspend-after-have-future-data and
> media-src-suspend-after-have-metadata as SlowTest(s) now that they no
> longer permanently time out. Each takes ~2ish seconds in release build
> and so meets the criteria for being a SlowTest.
> 
> This also changes WMPI to not try and get the current time value prior
> to the HaveCurrentData state (which Blink already respects).
> 
> ========= [ Original Description Follows ] ===============
> 
> HTMLMediaElement should tell WebMediaPlayer about play state changes
> as soon as the kHaveMetaData state is reached.
> 
> This will eventually allow us to delete a bunch of guessing-game type
> code for idle suspension and instead rely on actually getting a play()
> call from Blink to wake up when needed.
> 
> We can't stop WMPI from reaching the future data state quite yet though,
> because it has implications on the delivery of 'canplay' and 'canplaythrough'
> events that need to be part of a larger preload=metadata experiment. See old
> discussion on this here:
> 
> https://lists.w3.org/Archives/Public/public-whatwg-archive/2015Jul/0007.html
> 
> Note: This change exposed some bugs in how the ready state maximum is used
> and the states at which a video frame is expected. These issues are fixed
> in the HTMLVideoElement.
> 
> BUG=694855, 756897, 809998
> TEST=existing suspend tests no longer flake.
> 
> Change-Id: Ie6297df474c1f5da56ca6c0e81efa636fbc349bf
> Reviewed-on: https://chromium-review.googlesource.com/915081
> Reviewed-by: Frank Liberato <liberato@chromium.org>
> Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
> Commit-Queue: Dale Curtis <dalecurtis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#536487}

TBR=dalecurtis@chromium.org,mlamouri@chromium.org,liberato@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 694855, 756897, 809998
Change-Id: I176b5116682851853ff2773e6e4a77a9ac2664b2
Reviewed-on: https://chromium-review.googlesource.com/920481Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Commit-Queue: Mounir Lamouri <mlamouri@chromium.org>
Cr-Commit-Position: refs/heads/master@{#536988}