dart2js: Use the NoInline annotation on getInterceptor in the JS runtime.

pkg/compiler/lib/src/cps_ir/type_propagation.dart

Index: pkg/compiler/lib/src/cps_ir/type_propagation.dart
diff --git a/pkg/compiler/lib/src/cps_ir/type_propagation.dart b/pkg/compiler/lib/src/cps_ir/type_propagation.dart
index 73e5871b7d4fa24588b865bb792fce967d76b8b1..429cf1155338fffbf6161da668df3d0f7497c5db 100644
--- a/pkg/compiler/lib/src/cps_ir/type_propagation.dart
+++ b/pkg/compiler/lib/src/cps_ir/type_propagation.dart
@@ -1672,7 +1672,7 @@ class TransformingVisitor extends LeafVisitor {
             node.target.treeElements.getSendStructure(expr);
         if (structure is InvokeStructure) {
           return structure.semantics.kind == AccessKind.TOPLEVEL_METHOD &&
-              compiler.backend.isForeign(structure.semantics.element);
+              backend.isForeign(structure.semantics.element);
         }
       }
       return false;
@@ -1680,12 +1680,9 @@ class TransformingVisitor extends LeafVisitor {
 
     ast.Statement body = node.target.node.body;
     bool shouldInline() {
-      // At compile time, 'getInterceptor' from the Javascript runtime has a
-      // foreign body that returns undefined.  It is later mutated by replacing
-      // it with a specialized version.  Inlining undefined would be wrong.
-      // TODO(kmillikin): matching the name prevents inlining other functions
-      // with the same name.
-      if (node.target.name == 'getInterceptor') return false;
+      if (backend.annotations.noInline(node.target)) {
+        return false;
+      }
 
       // Inline functions that are a single return statement, expression
       // statement, or block containing a return statement or expression