[turbofan] Don't run graph verifier on scheduled graphs.

src/compiler/pipeline.h

Index: src/compiler/pipeline.h
diff --git a/src/compiler/pipeline.h b/src/compiler/pipeline.h
index 9af4a76f15b3de0a39efb35229338ae716265e1c..b219848d218b5b83b731a7dc665bf3a5175e49a0 100644
--- a/src/compiler/pipeline.h
+++ b/src/compiler/pipeline.h
@@ -30,8 +30,8 @@ class Pipeline {
   // Run the entire pipeline and generate a handle to a code object.
   Handle<Code> GenerateCode();
 
-  // Run the pipeline on an code stub machine graph and generate code. A valid
-  // schedule must be provided.
+  // Run the pipeline on a machine graph and generate code. The {schedule} must
+  // be valid, hence the given {graph} does not need to be schedulable.
   static Handle<Code> GenerateCodeForCodeStub(Isolate* isolate,
                                               CallDescriptor* call_descriptor,
                                               Graph* graph, Schedule* schedule,