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 : 9142be547b2eeef37a8073a710ce23070f98cf65