extensions: Relocate pref name constants.

extensions: Relocate pref name constants.

Move extension-related pref name constants used by the
ExtensionPrefs class from chrome/common/pref_names.h to
extensions/browser/pref_names.h. Remove "Extension" from the
beginning of the constant identifiers and "Pref" from the
end since it seemed redundant now that they're in the
extensions::pref_names namespace.

Also delete prefs::kExtensionBlacklistUpdateVersion since it
hasn't been used in about a year.

BUG=313284
TBR=isherman@chromium.org,sky@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=245374

[Daniel Erat, 2014-01-16 00:32:35]

This ended up being more manual than I would've liked. :-(

[Yoyo Zhou, 2014-01-16 19:49:04]

LGTM

https://codereview.chromium.org/140343002/diff/50001/extensions/browser/pref_...
File extensions/browser/pref_names.h (right):

https://codereview.chromium.org/140343002/diff/50001/extensions/browser/pref_...
extensions/browser/pref_names.h:31: extern const char kLastChromeVersion[];
Can these be in alphabetical order?

[Daniel Erat, 2014-01-16 20:50:30]

https://codereview.chromium.org/140343002/diff/50001/extensions/browser/pref_...
File extensions/browser/pref_names.h (right):

https://codereview.chromium.org/140343002/diff/50001/extensions/browser/pref_...
extensions/browser/pref_names.h:31: extern const char kLastChromeVersion[];
On 2014/01/16 19:49:05, Yoyo Zhou wrote:
> Can these be in alphabetical order?

Done.

[Daniel Erat, 2014-01-16 21:13:55]

TBR isherman@ and sky@

[commit-bot: I haz the power, 2014-01-16 21:15:03]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/derat@chromium.org/140343002/110001

[commit-bot: I haz the power, 2014-01-16 23:32:31]

Change committed as 245374