Bug 841014 - Rename nsTimeRanges.h to TimeRanges.h. r=Ms2ger

--HG--
rename : content/html/content/src/nsTimeRanges.cpp => content/html/content/src/TimeRanges.cpp
rename : content/html/content/src/nsTimeRanges.h => content/html/content/src/TimeRanges.h
Bug 841014 - Convert TimeRanges to WebIDL. r=Ms2ger, r=peterv