CC: Add back UpdateDrawProperties for pending tree.

It was remove in:
https://chromiumcodereview.appspot.com/24070006/

It's needed to keep pending tree up-to-date.

BUG=297852
NOTRY=true

Review URL: https://codereview.chromium.org/24674002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225576 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 225576
Use real network prefix for small network check.

BUG=295997

Review URL: https://codereview.chromium.org/24716002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225577 0039d316-1c4b-4281-b951-d872f2087c98
Remove Drive mounting support.

The VolumeManager.mountDrive is removed, so it's time to remove the hack code
in addMount.
Note that, we no longer need the volume_type parameter in the argument of
addMount private API. It'll be cleaned in a separate CL.

BUG=279276
TEST=Ran unit_tests

Review URL: https://codereview.chromium.org/24722002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225578 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 225578
remove use of Local::New with implicit isolate

R=jochen@chromium.org
BUG=

Review URL: https://codereview.chromium.org/24735002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225579 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 225579