Implement KnownSuccessor method to some control instructions.

R=jkummerow@chromium.org
BUG=v8:3118
LOG=N

Review URL: https://codereview.chromium.org/174863002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19759 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Mark mjsunit/string-case as flaky.

BUG=v8:3208
LOG=N
R=machenbach@chromium.org

Review URL: https://codereview.chromium.org/192573004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19760 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Set svn:ignore for new test262 file path.



git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19761 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix constant folding of %_IsMinusZero.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/190793015

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19762 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/master'