First implementation of allocation elimination in Hydrogen.

This change implements a simple data-flow analysis pass over captured
objects to the existing escape analysis. It tracks the state of values
in the Hydrogen graph through CapturedObject marker instructions that
are used to construct an appropriate translation for the deoptimizer to
be able to materialize these objects again.

This can be considered a combination of scalar replacement of loads and
stores on captured objects and sinking of unused allocations.

R=titzer@chromium.org
TEST=mjsunit/compiler/escape-analysis

Review URL: https://codereview.chromium.org/21055011

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16098 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Move i18n's number-format C++ code to runtime

BUG=v8:2745
R=dcarney@chromium.org, mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/22266009

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16099 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix step in positions (include various calls and exclude current pc point), add a test

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/22198002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16100 ce2b1a6d-e550-0410-aec6-3dcde31c8c00