Remove default monomorphic check code from functions and stubs that do not need it.

runtime/vm/megamorphic_cache_table.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/megamorphic_cache_table.h"
 
 #include <stdlib.h>
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/stub_code.h"
@@ skipping 47 matching lines @@
                                       StubCode::GenerateMegamorphicMissStub));
   // When FLAG_lazy_dispatchers=false, this stub can be on the stack during
   // exceptions, but it has a corresponding function so IsStubCode is false and
   // it is considered in the search for an exception handler.
   code.set_exception_handlers(Object::empty_exception_handlers());
   const Class& cls =
       Class::Handle(Type::Handle(Type::DartFunctionType()).type_class());
   const Function& function =
       Function::Handle(Function::New(Symbols::MegamorphicMiss(),
                                      RawFunction::kRegularFunction,
-                                     false,  // Not static.
+                                     true,  // Static, but called as a method.
                                      false,  // Not const.
                                      false,  // Not abstract.
                                      false,  // Not external.
                                      false,  // Not native.
                                      cls,
                                      TokenPosition::kNoSource));
   function.set_result_type(Type::Handle(Type::DynamicType()));
   function.set_is_debuggable(false);
   function.set_is_visible(false);
-  function.AttachCode(code);
+  function.AttachCode(code);  // Has a single entry point, as a static function.
   // For inclusion in Snapshot::kAppWithJIT.
   function.set_unoptimized_code(code);
 
   isolate->object_store()->SetMegamorphicMissHandler(code, function);
 }
 
 
 void MegamorphicCacheTable::PrintSizes(Isolate* isolate) {
   StackZone zone(Thread::Current());
   intptr_t size = 0;
@@ skipping 56 matching lines @@
     cumulative_entries += probe_counts[i];
     OS::Print("Megamorphic probe %" Pd ": %" Pd " (%lf)\n",
               i, probe_counts[i],
               static_cast<double>(cumulative_entries) /
               static_cast<double>(entry_count));
   }
   delete[] probe_counts;
 }
 
 }  // namespace dart