Bug 939385 (part 1, attempt 2) - Rename largestContiguousVMBlock as vsizeMaxContiguous.  r=froydnj.

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extra : rebase_source : e5bdf43ab2a228f3ade93e803988f81d4f3a646e
Bug 939385 (part 2, attempt 2) - Expose vsizeMaxContiguous to telemetry.  r=froydnj.

--HG--
extra : rebase_source : c6d4438abd5d17ab70805c59baa68bbc2962b9ba
Bug 939385 (part 3, attempt 2) - Expose vsizeMaxContiguous to about:memory.  r=froydnj.

--HG--
extra : rebase_source : 2a7dcf2121c323bb37094b23e329c322f25dfeeb
Bug 939385 (part 4, attempt 2) - Rename some distinguished amount functions.  r=froydnj.

--HG--
extra : rebase_source : fc5a8b80752156cf8d13908eb2f961d75a954126