WIP debugger-memory-allocation-sites-getter-setter
existing tests pass, now need to write some for D.M.p.trackingAllocationSites
works properly now, have a basic test
Adding more tests
Adding header includes and little stuff for compilers that aren't clang, I guess.
Make more functions not static so they can be shared
Move Debugger::fromJSObject into Debugger-inl.h
Fixing header include order, no reentrant allocation site saving, and optimizing a little bit of SavedFrame's hashing
WIP on allocation site docs
responding to feedback; have failing test for adding/removing debuggees; need to move method still
passing test for multiple debuggers trying to track allocations
move the allocation getting to Debugger.Object.prototype.allocationSite getter
wip on docs
trying to fix the hazards...
Fixing up docs based on review
Add forgetObjectMetadataCallback and remove the cleanupDebuggeeGlobalBeforeRemovalUnderGC variant
WIP memoize PCToLineNumber

All tests passing, but haven't done any measuerments to confirm a speed up
Moving into SavedStacks; failures
passing tests wooo