Get rid of HEAP_PROFILE macro

All usages of the macro were replaced with direct calls to the heap profiler. The macro does null check for HeapProfiler which is always true.

BUG=None
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/26166004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17242 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix lower bound of shr.

BUG=
R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/27503002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17243 ce2b1a6d-e550-0410-aec6-3dcde31c8c00