Revert "Don't need a temp register for StoreKeyed double"

This reverts commit r19829 for breaking the mozilla tests.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/196343003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19830 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fixed range analysis for HMathFloorOfDiv.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/195133002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19831 ce2b1a6d-e550-0410-aec6-3dcde31c8c00