Revert "Minor clarifications and simplifications as well as additional checks."

This reverts commit d32eacbdea3fc0c119da06abe95b07a83c67aa48.

TBR=rossberg@chromium.org
BUG=

Review URL: https://codereview.chromium.org/410083005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22569 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
MIPS: Always use the LoadStubCompiler for Load handlers, also for keyedload handlers.

Port r22551 (0cc23b1)

BUG=
R=paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/415623002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22570 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
[Auto-roll] Bump up version to 3.28.34.0

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/411003002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22571 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Revert "Track history of events in GCTracer."

This reverts commit 22567 for breaking win64 compile.

BUG=
TBR=ernstm@chromium.org

Review URL: https://codereview.chromium.org/414743002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22572 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/bleeding_edge' into bleeding_edge