Revert "Move precompilation-related flags to flags list."

runtime/vm/block_scheduler.cc

 // Copyright (c) 2013, 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/block_scheduler.h"
 
 #include "vm/allocation.h"
 #include "vm/code_patcher.h"
 #include "vm/compiler.h"
 #include "vm/flow_graph.h"
 
 namespace dart {
 
+DEFINE_FLAG(bool, emit_edge_counters, true, "Emit edge counters at targets.");
+
 static intptr_t GetEdgeCount(const Array& edge_counters, intptr_t edge_id) {
   if (!FLAG_emit_edge_counters) {
     // Assume everything was visited once.
     return 1;
   }
   return Smi::Value(Smi::RawCast(edge_counters.At(edge_id)));
 }
 
 
 // There is an edge from instruction->successor.  Set its weight (edge count
@@ skipping 184 matching lines @@
   for (intptr_t i = block_count - 1; i >= 0; --i) {
     if (chains[i]->first->block == flow_graph()->postorder()[i]) {
       for (Link* link = chains[i]->first; link != NULL; link = link->next) {
         flow_graph()->CodegenBlockOrder(true)->Add(link->block);
       }
     }
   }
 }
 
 }  // namespace dart