Auto open blink tree.
Auto open blink tree.

BUG=359314
TBR=eseidel@chromium.org

Review URL: https://codereview.chromium.org/331593013

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@280122 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build