Oilpan: Rename DefaultTraceTrait to AdjustAndMarkTrait

Oilpan: Rename DefaultTraceTrait to AdjustAndMarkTrait

What DefaultTraceTrait does is to adjust a pointer of a mixin object and call mark.
It should be renamed to reflect the reality.

BUG=475801
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=196446

[haraken, 2015-06-03 12:06:00]

haraken@chromium.org changed reviewers:
+ keishi@chromium.org, oilpan-reviews@chromium.org, yutak@chromium.org

[haraken, 2015-06-03 12:06:01]

PTAL

[keishi, 2015-06-03 14:50:56]

lgtm

[haraken, 2015-06-04 01:41:42]

The CQ bit was checked by haraken@chromium.org

[haraken, 2015-06-04 01:41:43]

The patchset sent to the CQ was uploaded after l-g-t-m from keishi@chromium.org
Link to the patchset: https://codereview.chromium.org/1162813003/#ps20001
(title: " ")

[commit-bot: I haz the power, 2015-06-04 01:42:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1162813003/20001

[commit-bot: I haz the power, 2015-06-04 03:00:09]

Committed patchset #2 (id:20001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=196446