Provide named links to code objects in heap snapshot.

R=loislo@chromium.org, verwaest@chromium.org, yurys@chromium.org

Review URL: https://codereview.chromium.org/19397002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15722 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Synchronize Compare-Literal behavior in FullCodegen and Hydrogen

BUG=chromium:260345
R=danno@chromium.org

Review URL: https://codereview.chromium.org/19582002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15723 ce2b1a6d-e550-0410-aec6-3dcde31c8c00