Move core/timing/ to oilpan's heap

This CL moves MemoryInfo, Performance, PerformanceEntry,
PerformanceMark, PerformanceMeasurement, PerformanceNavigation,
PerformanceResourceTiming, PerformanceTiming and UserTiming to oilpan's heap.

This CL also supports inheritance of [WillBeGarbageCollected] in IDL files.
If a parent IDL file has [WillBeGarbageCollected],
then it is inherited to child IDL files.

NOTRY=true

BUG=340522

Review URL: https://codereview.chromium.org/170143002

git-svn-id: svn://svn.chromium.org/blink/trunk@167398 bbb929c8-8fbe-4397-9dbb-9b2b20218538