Bug 955942 (part 1) - Remove unnecessary nsIMemoryReporter qualifiers from UNITS_* and KIND_* constants.  r=mccr8.

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extra : rebase_source : f760568c08af03d9fec316bf95e7d4388078a03d
Bug 955942 (part 2) - Remove MemoryUniReporter.  r=mccr8.

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extra : rebase_source : 9d70016cb19637ffece6409a184bf41d574cc6b4
Bug 955942 (part 3) - Merge the heap reporters.  r=mccr8.

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extra : rebase_source : f836b1b2de9c850fa3d956bf6ef92a7c6c504fce