Try avoiding MISS for callic monomorphic case.

BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/704143003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25207 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Perform context disposal garbage collections only if contexts disposals happen at a high rate.

BUG=
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/710603003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25208 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
[arm64] Bug fix in sapefoint recording.

cp is handled by the register allocator and doesn't necessarily hold the
context pointer on arm64.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/695323005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25209 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
[turbofan][arm64] Optimize shifts combined with truncations or extensions.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/705983002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25210 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Revert r24922 "Windows: use SystemTimeToTzSpecificLocalTime instead of localtime_s."

SystemTimeToTzSpecificLocalTime doesn't work correctly inside Chrome sandbox.

BUG=chromium:417640
LOG=Y
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/710643002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25211 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Use current time to calculate context disposal rate.

BUG=
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/679363003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25212 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Remove heap size filter for context disposal garbage collection.

BUG=
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/712563002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25213 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/master'