Bug 923434 - Don't use operator source for D2D in ThebesLayerBuffer since it's slower. r=Bas, a=bajaj
Bug 923434 - Use DrawSurface in ThebesLayerBuffer instead of FillRect. r=Bas, a=bajaj
Bug 936317 - Prevent MediaBufferDecoder threads from waiting after AudioContext shutdown(). r=ehsan, a=bajaj
Bug 926023 - Use the value of SetPermitSubpixelAA for DrawTargetCairo. r=Bas, a=bajaj