Indexed DB: Remove transaction throttle

Indexed DB: Remove transaction throttle

A transaction throttle was introduced in https://crrev.com/1511973004
to mitigate behavior where a renderer was issuing transactions faster
than they could be processed, leading to eventual OOM. Unfortunately,
it looks like some apps are relying on behavior that trips this
throttle, so we need to rethink it. Remove the throttle, but keep
recording UMA stats.

R=cmumford@chromium.org
BUG=338800, 584768
Review URL: https://codereview.chromium.org/1671193003

Cr-Commit-Position: refs/heads/master@{#374443}
(cherry picked from commit 8b348ae7675a7db880b2dee87a582a79377d8fa8)

Committed: https://chromium.googlesource.com/chromium/src/+/59e29d78bd78a2f1bf68c9240ce67c6407d1ac42

[jsbell, 2016-02-12 18:00:31]

Description was changed from

==========
Indexed DB: Remove transaction throttle

A transaction throttle was introduced in https://crrev.com/1511973004
to mitigate behavior where a renderer was issuing transactions faster
than they could be processed, leading to eventual OOM. Unfortunately,
it looks like some apps are relying on behavior that trips this
throttle, so we need to rethink it. Remove the throttle, but keep
recording UMA stats.

R=cmumford@chromium.org
BUG=338800,584768

Review URL: https://codereview.chromium.org/1671193003

Cr-Commit-Position: refs/heads/master@{#374443}
(cherry picked from commit 8b348ae7675a7db880b2dee87a582a79377d8fa8)
==========

to

==========
Indexed DB: Remove transaction throttle

A transaction throttle was introduced in https://crrev.com/1511973004
to mitigate behavior where a renderer was issuing transactions faster
than they could be processed, leading to eventual OOM. Unfortunately,
it looks like some apps are relying on behavior that trips this
throttle, so we need to rethink it. Remove the throttle, but keep
recording UMA stats.

R=cmumford@chromium.org
BUG=338800,584768

Review URL: https://codereview.chromium.org/1671193003

Cr-Commit-Position: refs/heads/master@{#374443}
(cherry picked from commit 8b348ae7675a7db880b2dee87a582a79377d8fa8)

Committed:
https://chromium.googlesource.com/chromium/src/+/59e29d78bd78a2f1bf68c9240ce6...
==========

[jsbell, 2016-02-12 18:00:33]

Committed patchset #1 (id:1) manually as
59e29d78bd78a2f1bf68c9240ce67c6407d1ac42 (tree was closed).