Add methods to enable configuration of ResourceConstraints based on limits derived at runtime.
Adds ConfigureResourceConstraintsForCurrentPlatform and SetDefaultResourceConstraintsForCurrentPlatform which configure the heap based on the available physical memory, rather than hard-coding by platform as previous. This change also adds OS::TotalPhysicalMemory to platform.h.
BUG=292928
R=danno@chromium.org, hpayer@chromium.org
Review URL: https://codereview.chromium.org/
24269003
Patch from Ross McIlroy <rmcilroy@chromium.org>.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16964
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00