Add metrics to rappor.xml for Device Motion and Device Orientation.

Add metrics to rappor.xml for Device Motion and Device Orientation.

This patch adds xml RAPPOR entries for measuring the Device Motion and
Device Orientation APIs usage.
Corresponding blink-side patch: crrev.com/1017433002.
This patch replaces the chromium patch: crrev.com/1021823005.

BUG=467648
Committed: https://crrev.com/1bd04004dccf0dc44b6d55d8e4ef84747a2eedcf
Cr-Commit-Position: refs/heads/master@{#325431}

[timvolodine, 2015-04-13 14:00:16]

timvolodine@chromium.org changed reviewers:
+ holte@chromium.org

[Steven Holte, 2015-04-13 19:03:45]

lgtm

[timvolodine, 2015-04-16 12:43:22]

The CQ bit was checked by timvolodine@chromium.org

[commit-bot: I haz the power, 2015-04-16 12:43:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1052013004/1

[commit-bot: I haz the power, 2015-04-16 13:15:55]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-16 13:16:46]

Patchset 1 (id:??) landed as
https://crrev.com/1bd04004dccf0dc44b6d55d8e4ef84747a2eedcf
Cr-Commit-Position: refs/heads/master@{#325431}