Add ic-compiler to BUILD.gn

BUG=
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/496303003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23308 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Re-land "Add finalize sweeping event to GCIdleTimeHandler."

BUG=
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/496303002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23309 ce2b1a6d-e550-0410-aec6-3dcde31c8c00