Remove --stop-at flag from several backends.

test/cctest/heap/test-heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 4196 matching lines @@
     }
 
     shared2 = inner_scope.CloseAndEscape(handle(f->shared(), isolate));
   }
 
   // Simulate incremental marking and collect code flushing candidates.
   SimulateIncrementalMarking(heap);
   CHECK(shared1->code()->gc_metadata() != NULL);
 
   // Optimize function and make sure the unoptimized code is replaced.
-#ifdef DEBUG
-  FLAG_stop_at = "f";
-#endif
   CompileRun("%OptimizeFunctionOnNextCall(g);"
              "g(false);");
 
   // Finish garbage collection cycle.
   heap->CollectAllGarbage();
   CHECK(shared1->code()->gc_metadata() == NULL);
 }
 
 
 TEST(Regress169928) {
@@ skipping 2260 matching lines @@
   isolate->IncrementJsCallsFromApiCounter();
   isolate->IncrementJsCallsFromApiCounter();
   isolate->IncrementJsCallsFromApiCounter();
   calls_per_ms = memory_reducer->SampleAndGetJsCallsPerMs(4);
   CheckDoubleEquals(2, calls_per_ms);
 }
 
 
 }  // namespace internal
 }  // namespace v8