Merge "Skip drawing snapshot if we can't create the buffer." into oc-mr1-dev

        decorPainter.drawDecors(c, null /* statusBarExcludeFrame */);

        node.end(c);

        final Bitmap hwBitmap = ThreadedRenderer.createHardwareBitmap(node, width, height);

        if (hwBitmap == null) {

            return null;

        }

        return new TaskSnapshot(hwBitmap.createGraphicBufferHandle(),

                topChild.getConfiguration().orientation, mainWindow.mStableInsets,

                ActivityManager.isLowRamDeviceStatic() /* reduced */, 1.0f /* scale */);