Split js interop registration into library/class/member elements

pkg/compiler/lib/src/js_emitter/program_builder/program_builder.dart

Index: pkg/compiler/lib/src/js_emitter/program_builder/program_builder.dart
diff --git a/pkg/compiler/lib/src/js_emitter/program_builder/program_builder.dart b/pkg/compiler/lib/src/js_emitter/program_builder/program_builder.dart
index 0a963161b5c35457d54bc2487912e70425bc82d4..17d3d019ddf87e4555fbb7432240e070006f1598 100644
--- a/pkg/compiler/lib/src/js_emitter/program_builder/program_builder.dart
+++ b/pkg/compiler/lib/src/js_emitter/program_builder/program_builder.dart
@@ -354,7 +354,7 @@ class ProgramBuilder {
         if (e is ClassElement && backend.nativeData.isJsInteropClass(e)) {
           e.declaration.forEachMember((_, Element member) {
             var jsName =
-                backend.nativeData.getUnescapedJSInteropName(member.name);
+                backend.nativeData.computeUnescapedJSInteropName(member.name);
             if (!member.isInstanceMember) return;
             if (member.isGetter || member.isField || member.isFunction) {
               var selectors = worldBuilder.getterInvocationsByName(member.name);