Bug 910517 - Remove nsIMemoryReporter, and rename nsIMemoryMultiReporter as nsIMemoryReporter.  r=mmcr8.

--HG--
rename : content/canvas/src/WebGLMemoryMultiReporterWrapper.h => content/canvas/src/WebGLMemoryReporterWrapper.h
extra : rebase_source : 76bf96ce8d6e16c8573584d9e8e70c80371f66eb