Remove unused HIsNumberAndBranch instruction.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/23691067

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16761 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Handlify JSReceiver::HasProperty and friends.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/23496058

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16762 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
reland 16744: add context save for GenerateFastApiCall

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23903053

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16763 ce2b1a6d-e550-0410-aec6-3dcde31c8c00