13742 Only specify –no-link-platform when not specifying –aot, roll dart-lang sdk

13744 Create a new picture recorder even when the embedder supplied render target is recycled.

13747 Move TextRange from the framework to dart:ui.

13760 Implement Path.computeMetrics in the CanvasKit backend

13762 Turn on RasterCache based on view hierarchy

13765 Change wordBoundary to take dynamic temporarily

13768 Add ImageFilter and BackdropFilter to CanvasKit backend

13772 Move Path and PathMetrics from canvas.dart into their own files. No delta

13780 Allow passing hot reload debugging flags through

13781 Create a WeakPtrFactory for use on the UI thread in VsyncWaiter