Prepare push to trunk.  Now working on version 3.25.2.

R=yangguo@chromium.org
TBR=yangguo@chromium.org

Review URL: https://codereview.chromium.org/174873002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19522 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
A64: Increase the margin for veneer checks.

BUG=v8:3168
LOG=N
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/171603008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19525 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Initialize interface descriptor for ToNumberStub.

R=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/170303003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19526 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
A64: Tidy up register use in TaggedToI

Fix bug where input register was potentially corrupted, tidy up register use in
TruncateDoubleToI and rename TryInlineTruncateDoubleToI.

BUG=
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/173663002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19527 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/bleeding_edge' into bleeding_edge