Clamp PerformanceResource and PerformanceTiming to 5us.

Clamp PerformanceResource and PerformanceTiming to 5us.

All DomHighResolutionTimes should be clamped to 5us. Do this for
PerformanceResource and PerformanceTiming.

BUG=506723
Committed: https://crrev.com/d07a1105b9dfb932278b54c66ca73ff1fce9453f
Cr-Commit-Position: refs/heads/master@{#351277}

[rmcilroy, 2015-09-28 17:34:57]

The CQ bit was checked by rmcilroy@chromium.org to run a CQ dry run

[rmcilroy, 2015-09-28 17:37:18]

rmcilroy@chromium.org changed reviewers:
+ esprehn@chromium.org

[rmcilroy, 2015-09-28 17:37:18]

Elliott, as discussed last week, this clamps the other DomHighResolutionTimes to
5us. No change was needed for PerformanceUserTiming because that uses
PerformanceBase::now() directly and so gets the clamping already.

PTAL, thanks.

[commit-bot: I haz the power, 2015-09-28 17:38:02]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1375683002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1375683002/1

[commit-bot: I haz the power, 2015-09-28 20:48:48]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-09-28 20:48:49]

Dry run: This issue passed the CQ dry run.

[esprehn, 2015-09-28 22:55:37]

lgtm

[esprehn, 2015-09-28 22:56:12]

On 2015/09/28 at 22:55:37, esprehn wrote:
> lgtm

We really need to centralize this though, having every API need to remember to
do this is bad. Ideally they'd all just call some kind of Now() API that always
did the clamp and * 1000

[rmcilroy, 2015-09-29 10:10:30]

On 2015/09/28 22:56:12, esprehn wrote:
> On 2015/09/28 at 22:55:37, esprehn wrote:
> > lgtm
> 
> We really need to centralize this though, having every API need to remember to
> do this is bad. Ideally they'd all just call some kind of Now() API that
always
> did the clamp and * 1000

Acknowledged.

[rmcilroy, 2015-09-29 10:10:34]

The CQ bit was checked by rmcilroy@chromium.org

[commit-bot: I haz the power, 2015-09-29 10:10:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1375683002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1375683002/1

[commit-bot: I haz the power, 2015-09-29 10:16:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-29 10:16:40]

Patchset 1 (id:??) landed as
https://crrev.com/d07a1105b9dfb932278b54c66ca73ff1fce9453f
Cr-Commit-Position: refs/heads/master@{#351277}