s/precendence/precedence/

s/precendence/precedence/

"precedence" is misspelled as "precendence" in the docs for
the chrome.power API. Fix it there as well as several other
places where it occurs.

BUG=none
TBR=sky@chromium.org,brettw@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=270539

[Daniel Erat, 2014-05-14 20:05:46]

The CQ bit was checked by derat@chromium.org

[commit-bot: I haz the power, 2014-05-14 20:06:59]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/derat@chromium.org/283113002/1

[commit-bot: I haz the power, 2014-05-14 22:07:58]

FYI, CQ is re-trying this CL (attempt #1).
Please consider checking whether the failures are real,
and report flakes to chrome-troopers@google.com.
The failing builders are:
  android_clang_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_clang_dbg/bui...)
  android_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_dbg/builds/18...)
  linux_chromium_chromeos_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_chrome...)
  linux_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_rel/bu...)

[commit-bot: I haz the power, 2014-05-14 22:27:08]

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

[commit-bot: I haz the power, 2014-05-14 22:27:08]

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

[Daniel Erat, 2014-05-14 22:33:19]

The CQ bit was checked by derat@chromium.org

[commit-bot: I haz the power, 2014-05-14 22:33:49]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/derat@chromium.org/283113002/1

[commit-bot: I haz the power, 2014-05-14 23:36:39]

FYI, CQ is re-trying this CL (attempt #1).
Please consider checking whether the failures are real,
and report flakes to chrome-troopers@google.com.
The failing builders are:
  linux_chromium_chromeos_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_chrome...)
  linux_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_rel/bu...)

[commit-bot: I haz the power, 2014-05-15 00:33:45]

Change committed as 270539