Bug 919318 - Drop the Get prefix on the frame methods GetFirstContinuation, GetLastContinuation, GetFirstInFlow, GetLastInFlow and also on nsLayoutUtils::GetLastContinuationWithChild, because they never return null.  r=dholbert
Bug 919318 - A few cosmetic changes after dropping the Get prefix on some methods.  r=dholbert
Bug 919936 - MemoryTextureClient/Host serialization unittests. r=BenWa