Introduce blink_devtools.gyp that just has the targets referenced from the outside

BUG=none
R=pfeldman@chromium.org, yurys@chromium.org

Review URL: https://codereview.chromium.org/102053004

git-svn-id: svn://svn.chromium.org/blink/trunk@163264 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove some dead code from the Notifications implementation.

R=atwilson@chromium.org, jochen
BUG=

Review URL: https://codereview.chromium.org/96213004

git-svn-id: svn://svn.chromium.org/blink/trunk@163265 bbb929c8-8fbe-4397-9dbb-9b2b20218538