Instrumenting copying string returned by GetRawDataResource to locate the source of jankiness.

Instrumenting copying string returned by GetRawDataResource to locate the source of jankiness.

Previous instrumentations showed that the jank is in this line:
*data = rb.GetRawDataResource(resource_id_).as_string();
And its average run time is 15.1 ms.
I also know that the expensive operation is outside of ResourceBundle::GetRawDataResourceForScale.
So, we have to suggest that it's indeed copying the string that is responsible for the jank.

BUG=422489
Committed: https://crrev.com/cc81e8300d4e586ceddab90242a31bdf0c8a2522
Cr-Commit-Position: refs/heads/master@{#302686}

[vadimt, 2014-11-04 02:57:16]

kalman@, please provide OWNERs approval

[vadimt, 2014-11-04 02:58:21]

vadimt@chromium.org changed reviewers:
+ kalman@chromium.org

[vadimt, 2014-11-04 02:58:22]

kalman@ please provide OWNER's approval

[not at google - send to devlin, 2014-11-04 17:52:47]

lgtm

[vadimt, 2014-11-04 19:06:18]

The CQ bit was checked by vadimt@chromium.org

[commit-bot: I haz the power, 2014-11-04 19:06:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/702543005/1

[commit-bot: I haz the power, 2014-11-04 20:22:03]

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

[commit-bot: I haz the power, 2014-11-04 20:22:04]

Try jobs failed on following builders:
  linux_chromium_chromeos_rel on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[vadimt, 2014-11-04 20:36:04]

The CQ bit was checked by vadimt@chromium.org

[commit-bot: I haz the power, 2014-11-04 20:37:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/702543005/1

[commit-bot: I haz the power, 2014-11-04 22:30:12]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-04 22:31:32]

Patchset 1 (id:??) landed as
https://crrev.com/cc81e8300d4e586ceddab90242a31bdf0c8a2522
Cr-Commit-Position: refs/heads/master@{#302686}