Bug 920852 (part 1) - Rename fields of ObjectsExtraSizes and CompartmentStats to match memory reporter paths.  r=till.

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extra : rebase_source : 0f55dd20e69d3410d0cb811529f53570f588cc5e
Bug 920852 (part 2) - Rename fields of ZoneStatsPod and StringInfo to match memory reporter paths.  r=till.

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extra : rebase_source : d67dc7deedee6213f640ca2ae31a959b66d8d64e
Bug 920852 (part 3) - Tweak various things about RuntimeStats.  r=till.

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extra : rebase_source : 0748417364e0b8be25846f573d93fc657b228d19
Bug 920852 (part 4) - Reorder a bunch of stuff.  r=till.

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extra : rebase_source : b386abc4bfcdc85fad4071eeb06de2ca83a17bd8