MD History: Trim long item titles to reduce effect on performance

MD History: Trim long item titles to reduce effect on performance

History items with extremely long titles are very slow to render,
due to needing to layout the entire title in order to determine where to
cut it off with ellipses. This greatly degrades the performance of MD
History in a profile which has visited several of these items.

This CL trims titles down to at most 300 characters before they are
rendered, which has no visible effect, but greatly improves performance.
On a profile that has visited crashsafari[dot]com, load time is reduced
from ~5000ms to ~1800ms on my Z620. Scrolling performance is also
greatly improved.

BUG=621347
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:closure_compilation

Committed: https://crrev.com/24e3e3772122abf6a01683c9b412256228428fd7
Cr-Commit-Position: refs/heads/master@{#403351}

[tsergeant, 2016-06-30 05:56:31]

Description was changed from

==========
MD History: Trim long item titles to reduce effect on performance

History items with extremely long titles are very slow to render,
due to needing to layout the entire title in order to determine where to
cut it off with ellipses. This greatly degrades the performance of MD
History in a profile which has visited several of these items.

This CL trims titles down to at most 300 characters before they are
rendered, which has no visible effect, but greatly improves performance.
On a profile that has visited crashsafari[dot]com, load time is reduced
from ~5000ms to ~1800ms on my Z620. Scrolling performance is also
greatly improved.

BUG=621347
==========

to

==========
MD History: Trim long item titles to reduce effect on performance

History items with extremely long titles are very slow to render,
due to needing to layout the entire title in order to determine where to
cut it off with ellipses. This greatly degrades the performance of MD
History in a profile which has visited several of these items.

This CL trims titles down to at most 300 characters before they are
rendered, which has no visible effect, but greatly improves performance.
On a profile that has visited crashsafari[dot]com, load time is reduced
from ~5000ms to ~1800ms on my Z620. Scrolling performance is also
greatly improved.

BUG=621347
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:closure_compilation
==========

[tsergeant, 2016-06-30 06:25:31]

tsergeant@chromium.org changed reviewers:
+ calamity@chromium.org

[Dan Beam, 2016-06-30 23:31:08]

dbeam@chromium.org changed reviewers:
+ dbeam@chromium.org

[Dan Beam, 2016-06-30 23:31:09]

lgtm

[tsergeant, 2016-06-30 23:40:30]

The CQ bit was checked by tsergeant@chromium.org

[commit-bot: I haz the power, 2016-06-30 23:41:20]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-06-30 23:54:04]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-06-30 23:54:19]

CQ bit was unchecked.

[commit-bot: I haz the power, 2016-06-30 23:57:03]

Description was changed from

==========
MD History: Trim long item titles to reduce effect on performance

History items with extremely long titles are very slow to render,
due to needing to layout the entire title in order to determine where to
cut it off with ellipses. This greatly degrades the performance of MD
History in a profile which has visited several of these items.

This CL trims titles down to at most 300 characters before they are
rendered, which has no visible effect, but greatly improves performance.
On a profile that has visited crashsafari[dot]com, load time is reduced
from ~5000ms to ~1800ms on my Z620. Scrolling performance is also
greatly improved.

BUG=621347
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:closure_compilation
==========

to

==========
MD History: Trim long item titles to reduce effect on performance

History items with extremely long titles are very slow to render,
due to needing to layout the entire title in order to determine where to
cut it off with ellipses. This greatly degrades the performance of MD
History in a profile which has visited several of these items.

This CL trims titles down to at most 300 characters before they are
rendered, which has no visible effect, but greatly improves performance.
On a profile that has visited crashsafari[dot]com, load time is reduced
from ~5000ms to ~1800ms on my Z620. Scrolling performance is also
greatly improved.

BUG=621347
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:closure_compilation

Committed: https://crrev.com/24e3e3772122abf6a01683c9b412256228428fd7
Cr-Commit-Position: refs/heads/master@{#403351}
==========

[commit-bot: I haz the power, 2016-06-30 23:57:05]

Patchset 2 (id:??) landed as
https://crrev.com/24e3e3772122abf6a01683c9b412256228428fd7
Cr-Commit-Position: refs/heads/master@{#403351}