bookmarks: Minor cleanups fixing some style issues.

- variables are unix_hacker.
- fix some indentations.
- member variables end in _
- add DISALLOW_COPY_AND_ASSIGN().

BUG=None
TEST=unit_tests
R=sky@chromium.org

Review URL: https://codereview.chromium.org/164753010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252333 0039d316-1c4b-4281-b951-d872f2087c98
Adding typing detection to the APM in chrome.

BUG=264611

Review URL: https://codereview.chromium.org/169803003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252334 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252334