Remove distinction between hidden and normal runtime functions

R=jkummerow@chromium.org, mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/346413004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22018 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Collect garbage with kReduceMemoryFootprintMask in IdleNotification.

BUG=350720
LOG=Y
TBR=hpayer@chromium.org

Review URL: https://codereview.chromium.org/345263004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22019 ce2b1a6d-e550-0410-aec6-3dcde31c8c00