Docserver: Make API features inherit 'channel' from their dependencies

Docserver: Make API features inherit 'channel' from their dependencies
(manifest or permission features). This fixes the availability data on
accessibilityFeatures and bluetoothLowEnergy, among others; anywhere the API
and dependency name differ.

BUG=375615
R=rockot@chromium.org
NOTRY=true

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=273935

[not at google - send to devlin, 2014-05-30 15:35:50]

danielj41 - FYI

[Ken Rockot(use gerrit already), 2014-05-30 16:12:35]

lgtm

[not at google - send to devlin, 2014-05-30 16:39:58]

The CQ bit was checked by kalman@chromium.org

[commit-bot: I haz the power, 2014-05-30 16:41:56]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/kalman@chromium.org/302143003/10001

[commit-bot: I haz the power, 2014-05-30 22:19:15]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_aosp on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_aosp/builds/7...)
  android_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_dbg/builds/19...)
  linux_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/linux_gpu/builds/...)

[not at google - send to devlin, 2014-05-30 23:24:17]

The CQ bit was unchecked by kalman@chromium.org

[not at google - send to devlin, 2014-05-30 23:24:22]

The CQ bit was checked by kalman@chromium.org

[commit-bot: I haz the power, 2014-05-30 23:30:18]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/kalman@chromium.org/302143003/10001

[commit-bot: I haz the power, 2014-05-30 23:35:27]

Change committed as 273935