Revert of MD Downloads: track downloads in C++, dispatch discrete JS updates

Revert of MD Downloads: track downloads in C++, dispatch discrete JS updates (patchset #7 id:180002 of https://codereview.chromium.org/1428833005/ )

Reason for revert:
This broke Android GN. More info on the bug.
BUG=563357
Original issue's description:
> MD Downloads: track downloads in C++, dispatch discrete JS updates
>
> Instead of both the C++ and the JS needing to create sparse and dense
> representations of download items (and reconcile the differences in some
> cases), just keep a sorted representation in C++ and send discrete,
> positioned updates to the JS.  This makes the C++ act more like a
> controller and makes the JS simply respond to commands in a performant
> way.
>
> R=asanka@chromium.org,dpapad@chromium.org
> BUG=526577
>
> Committed: https://crrev.com/099dfdd09d2dd8e2d8228c955a89069fc971d625
> Cr-Commit-Position: refs/heads/master@{#362063}

TBR=asanka@chromium.org,dpapad@chromium.org,dbeam@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=526577
Committed: https://crrev.com/8f817f0d8f9b81ec1d0fdf1763fecfb85575574b
Cr-Commit-Position: refs/heads/master@{#362108}

[vabr (Chromium), 2015-11-30 09:01:20]

Created Revert of MD Downloads: track downloads in C++, dispatch discrete JS
updates

[commit-bot: I haz the power, 2015-11-30 09:03:05]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1480263002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1480263002/1

[commit-bot: I haz the power, 2015-11-30 09:04:10]

Description was changed from

==========
Revert of MD Downloads: track downloads in C++, dispatch discrete JS updates
(patchset #7 id:180002 of https://codereview.chromium.org/1428833005/ )

Reason for revert:
This broke Android GN. More info on the bug.
BUG=563357

Original issue's description:
> MD Downloads: track downloads in C++, dispatch discrete JS updates
> 
> Instead of both the C++ and the JS needing to create sparse and dense
> representations of download items (and reconcile the differences in some
> cases), just keep a sorted representation in C++ and send discrete,
> positioned updates to the JS.  This makes the C++ act more like a
> controller and makes the JS simply respond to commands in a performant
> way.
> 
> R=asanka@chromium.org,dpapad@chromium.org
> BUG=526577
> 
> Committed: https://crrev.com/099dfdd09d2dd8e2d8228c955a89069fc971d625
> Cr-Commit-Position: refs/heads/master@{#362063}

TBR=asanka@chromium.org,dpapad@chromium.org,dbeam@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=526577
==========

to

==========
Revert of MD Downloads: track downloads in C++, dispatch discrete JS updates
(patchset #7 id:180002 of https://codereview.chromium.org/1428833005/ )

Reason for revert:
This broke Android GN. More info on the bug.
BUG=563357

Original issue's description:
> MD Downloads: track downloads in C++, dispatch discrete JS updates
> 
> Instead of both the C++ and the JS needing to create sparse and dense
> representations of download items (and reconcile the differences in some
> cases), just keep a sorted representation in C++ and send discrete,
> positioned updates to the JS.  This makes the C++ act more like a
> controller and makes the JS simply respond to commands in a performant
> way.
> 
> R=asanka@chromium.org,dpapad@chromium.org
> BUG=526577
> 
> Committed: https://crrev.com/099dfdd09d2dd8e2d8228c955a89069fc971d625
> Cr-Commit-Position: refs/heads/master@{#362063}

TBR=asanka@chromium.org,dpapad@chromium.org,dbeam@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=526577
==========

[commit-bot: I haz the power, 2015-11-30 09:04:11]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-30 09:05:01]

Description was changed from

==========
Revert of MD Downloads: track downloads in C++, dispatch discrete JS updates
(patchset #7 id:180002 of https://codereview.chromium.org/1428833005/ )

Reason for revert:
This broke Android GN. More info on the bug.
BUG=563357

Original issue's description:
> MD Downloads: track downloads in C++, dispatch discrete JS updates
> 
> Instead of both the C++ and the JS needing to create sparse and dense
> representations of download items (and reconcile the differences in some
> cases), just keep a sorted representation in C++ and send discrete,
> positioned updates to the JS.  This makes the C++ act more like a
> controller and makes the JS simply respond to commands in a performant
> way.
> 
> R=asanka@chromium.org,dpapad@chromium.org
> BUG=526577
> 
> Committed: https://crrev.com/099dfdd09d2dd8e2d8228c955a89069fc971d625
> Cr-Commit-Position: refs/heads/master@{#362063}

TBR=asanka@chromium.org,dpapad@chromium.org,dbeam@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=526577
==========

to

==========
Revert of MD Downloads: track downloads in C++, dispatch discrete JS updates
(patchset #7 id:180002 of https://codereview.chromium.org/1428833005/ )

Reason for revert:
This broke Android GN. More info on the bug.
BUG=563357

Original issue's description:
> MD Downloads: track downloads in C++, dispatch discrete JS updates
>
> Instead of both the C++ and the JS needing to create sparse and dense
> representations of download items (and reconcile the differences in some
> cases), just keep a sorted representation in C++ and send discrete,
> positioned updates to the JS.  This makes the C++ act more like a
> controller and makes the JS simply respond to commands in a performant
> way.
>
> R=asanka@chromium.org,dpapad@chromium.org
> BUG=526577
>
> Committed: https://crrev.com/099dfdd09d2dd8e2d8228c955a89069fc971d625
> Cr-Commit-Position: refs/heads/master@{#362063}

TBR=asanka@chromium.org,dpapad@chromium.org,dbeam@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=526577

Committed: https://crrev.com/8f817f0d8f9b81ec1d0fdf1763fecfb85575574b
Cr-Commit-Position: refs/heads/master@{#362108}
==========

[commit-bot: I haz the power, 2015-11-30 09:05:02]

Patchset 1 (id:??) landed as
https://crrev.com/8f817f0d8f9b81ec1d0fdf1763fecfb85575574b
Cr-Commit-Position: refs/heads/master@{#362108}