cpsir: implementation of jsinterop in cps ir

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

Index: pkg/compiler/lib/src/cps_ir/inline.dart
diff --git a/pkg/compiler/lib/src/cps_ir/inline.dart b/pkg/compiler/lib/src/cps_ir/inline.dart
index 87892d3a1fe888ce912bfbe58baa9ef96d9bd7d7..97922db105ee8089eac72c28c1c2d3a31d2d3549 100644
--- a/pkg/compiler/lib/src/cps_ir/inline.dart
+++ b/pkg/compiler/lib/src/cps_ir/inline.dart
@@ -394,6 +394,7 @@ class InliningVisitor extends TrampolineRecursiveVisitor {
     // AST node, targets that are asynchronous or generator functions, or
     // targets containing a try statement.
     if (!target.hasNode) return null;
+    if (backend.isJsInterop(target)) return null;
     if (target.asyncMarker != AsyncMarker.SYNC) return null;
     // V8 does not optimize functions containing a try statement.  Inlining
     // code containing a try statement will make the optimizable calling code