Turn keyed loads with string-based (non-convertible to array-index) key into named loads

BUG=
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/585433002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24032 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Implement ToLength from ES6 section 7.1.15

BUG=
R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/552273002

Patch from Caitlin Potter <caitpotter88@gmail.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24036 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Move state sentinels into TypeFeedbackVector.

These sentinels were in the wrong place, living in only tangentially related class TypeFeedbackInfo, but they codify state in the TypeFeedbackVector.

R=ishell@chromium.org

Review URL: https://codereview.chromium.org/579153003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24037 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Capacity returns allocatable memory and TotalCapacity returns allocatable plus non-allocatable memory for the new space.
BUG=
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/577223002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24040 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix gcmole warning.

TBR=ishell@chromium.org

Review URL: https://codereview.chromium.org/582033002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24041 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Convert KeyedLoad indexed interceptor case to a Handler.

Currently, KeyedLoads on objects with indexed interceptors are handled with a
special stub. Instead, key on the map and handler mechanism for more uniform
treatment.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/575373004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24042 ce2b1a6d-e550-0410-aec6-3dcde31c8c00