Remove deprecated storage-related methods from Blink API

Review URL: https://chromiumcodereview.appspot.com/17702003

git-svn-id: svn://svn.chromium.org/blink/trunk@154323 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Support continueToLocation work in the middle of statement (for step into selection)

Test depends on another change:
https://codereview.chromium.org/18729002/

Review URL: https://chromiumcodereview.appspot.com/18467011

git-svn-id: svn://svn.chromium.org/blink/trunk@154324 bbb929c8-8fbe-4397-9dbb-9b2b20218538