Inline platform-tls*.h files into platform.h.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/20684002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15892 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Disable Smi representation support for HMathMinMax

because it's incomplete on x64.

BUG=v8:2808
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/20690002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15893 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Check that ExternalString objects get aligned resources.

R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/20305004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15894 ce2b1a6d-e550-0410-aec6-3dcde31c8c00