Rename the global inference task and reduce it's API surface by introducing the

pkg/compiler/lib/src/js_backend/no_such_method_registry.dart

Index: pkg/compiler/lib/src/js_backend/no_such_method_registry.dart
diff --git a/pkg/compiler/lib/src/js_backend/no_such_method_registry.dart b/pkg/compiler/lib/src/js_backend/no_such_method_registry.dart
index 4464214dcfb7150e30428f4f890b50f0c7281b2c..bef06b2568ae39ceb202965591faa736a1a39249 100644
--- a/pkg/compiler/lib/src/js_backend/no_such_method_registry.dart
+++ b/pkg/compiler/lib/src/js_backend/no_such_method_registry.dart
@@ -125,9 +125,7 @@ class NoSuchMethodRegistry {
   }
 
   _subcategorizeOther(FunctionElement element) {
-    TypeMask returnType =
-        _compiler.typesTask.getGuaranteedReturnTypeOfElement(element);
-    if (returnType == const TypeMask.nonNullEmpty()) {
+    if (_compiler.globalInference.throwsAlways(element)) {
       complexNoReturnImpls.add(element);
     } else {
       complexReturningImpls.add(element);