Move static flag modifications to V8::InitializeOncePerProcessImpl().

BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/17250006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15198 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Disable stress_compaction flag in several GC tests to meet test
expectations.

BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/17262002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15199 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Removed ReplaceResultBuilder.

Most of its code was dead, and the remaining part was a simple
one-liner, which is now inlined at its single call-site.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/17101021

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15200 ce2b1a6d-e550-0410-aec6-3dcde31c8c00