[Abandoned] rename PermissionBubbleRequest to PermissionRequest.

WIP: rename PermissionBubbleRequest to PermissionRequest.

This is a step toward having a generic permission request handling for
all platforms instead of having desktop-specific bubbles.

BUG=<TODO>

[mlamouri (slow - plz ping), 2016-04-23 11:54:26]

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

[commit-bot: I haz the power, 2016-04-23 11:54:30]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1689513002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1689513002/20001

[commit-bot: I haz the power, 2016-04-23 12:08:27]

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

[commit-bot: I haz the power, 2016-04-23 12:08:28]

Dry run: Try jobs failed on following builders:
  linux_chromium_chromeos_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  linux_chromium_compile_dbg_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  mac_chromium_rel_ng on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[mlamouri (slow - plz ping), 2016-08-10 13:57:58]

Tim and Ben, FYI, I'm closing this. Not sure if you've landed something similar
yet.

[tsergeant, 2016-08-10 23:03:34]

On 2016/08/10 13:57:58, Mounir Lamouri wrote:
> Tim and Ben, FYI, I'm closing this. Not sure if you've landed something
similar
> yet.

Yup, a number of similar renames have now landed.