Merged bleeding edge r20949 into 3.25 branch.

Mark the simulate before EnterInlined with BailoutId::None(), and set ReturnId on EnterInlined. When merging simulates into the simulate before enter-inlined, adopt the last AST id that gets merged into it.

BUG=v8:3282
LOG=N
R=danno@chromium.org

Review URL: https://codereview.chromium.org/283923003

git-svn-id: https://v8.googlecode.com/svn/branches/3.25@21308 ce2b1a6d-e550-0410-aec6-3dcde31c8c00