Add @JSName annotation for native fields and methods.

sdk/lib/_internal/compiler/implementation/apiimpl.dart

Index: sdk/lib/_internal/compiler/implementation/apiimpl.dart
diff --git a/sdk/lib/_internal/compiler/implementation/apiimpl.dart b/sdk/lib/_internal/compiler/implementation/apiimpl.dart
index e84d45c15b1f15e92a1fdf2b013d2f8646884079..ace56e051552fd08d4a80053bd4f8a8c3b49ee8e 100644
--- a/sdk/lib/_internal/compiler/implementation/apiimpl.dart
+++ b/sdk/lib/_internal/compiler/implementation/apiimpl.dart
@@ -31,7 +31,9 @@ class Compiler extends leg.Compiler {
             enableUserAssertions: hasOption(options, '--enable-checked-mode'),
             enableMinification: hasOption(options, '--minify'),
             enableNativeLiveTypeAnalysis:
-              hasOption(options, '--enable-native-live-type-analysis'),
+              hasOption(options, '--disable-native-live-type-analysis')
+                  ? false
+                  : hasOption(options, '--enable-native-live-type-analysis'),
             emitJavaScript: !hasOption(options, '--output-type=dart'),
             disallowUnsafeEval: hasOption(options, '--disallow-unsafe-eval'),
             analyzeAll: hasOption(options, '--analyze-all'),