DDC: mostly incremental compilation, fixes #223

lib/runtime/dart/_native_typed_data.txt

Index: lib/runtime/dart/_native_typed_data.txt
diff --git a/lib/runtime/dart/_native_typed_data.txt b/lib/runtime/dart/_native_typed_data.txt
new file mode 100644
index 0000000000000000000000000000000000000000..0a714192fd645830123f4cf225a9102956fa6575
--- /dev/null
+++ b/lib/runtime/dart/_native_typed_data.txt
@@ -0,0 +1,6 @@
+severe: [AnalyzerMessage] The final variable 'lengthInBytes' must be initialized (dart:_native_typed_data, line 24, col 13)
+severe: [AnalyzerMessage] The final variable 'buffer' must be initialized (dart:_native_typed_data, line 427, col 20)
+severe: [AnalyzerMessage] The final variable 'lengthInBytes' must be initialized (dart:_native_typed_data, line 433, col 13)
+severe: [AnalyzerMessage] The final variable 'offsetInBytes' must be initialized (dart:_native_typed_data, line 439, col 13)
+severe: [AnalyzerMessage] The final variable 'elementSizeInBytes' must be initialized (dart:_native_typed_data, line 446, col 13)
+severe: [AnalyzerMessage] The getter 'length' is not defined for the class 'NativeTypedData' (dart:_native_typed_data, line 452, col 28)