Fix bug 4648: invalidate type parameter optimization on a method if a call with a selector that has…

lib/compiler/implementation/ssa/builder.dart

Index: lib/compiler/implementation/ssa/builder.dart
===================================================================
--- lib/compiler/implementation/ssa/builder.dart	(revision 11214)
+++ lib/compiler/implementation/ssa/builder.dart	(working copy)
@@ -2376,6 +2376,8 @@
         compiler.cancel('Unimplemented non-matching static call', node: node);
       }
       HInvokeStatic instruction = new HInvokeStatic(inputs);
+      // TODO(ngeoffray): Only do this if knowing the return type is
+      // useful.
       HType returnType =
           builder.backend.optimisticReturnTypesWithRecompilationOnTypeChange(
               work.element, element);