Revert "Remove deprecated ShouldSelfOptimize machinery."

src/compiler.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_H_
 #define V8_COMPILER_H_
 
 #include "src/allocation.h"
 #include "src/ast.h"
 #include "src/bailout-reason.h"
@@ skipping 283 matching lines @@
 
   // Deoptimization support.
   bool HasDeoptimizationSupport() const {
     return GetFlag(kDeoptimizationSupport);
   }
   void EnableDeoptimizationSupport() {
     DCHECK(IsOptimizable());
     SetFlag(kDeoptimizationSupport);
   }
 
+  // Determines whether or not to insert a self-optimization header.
+  bool ShouldSelfOptimize();
+
   void set_deferred_handles(DeferredHandles* deferred_handles) {
     DCHECK(deferred_handles_ == NULL);
     deferred_handles_ = deferred_handles;
   }
 
   ZoneList<Handle<HeapObject> >* dependencies(
       DependentCode::DependencyGroup group) {
     if (dependencies_[group] == NULL) {
       dependencies_[group] = new(zone_) ZoneList<Handle<HeapObject> >(2, zone_);
     }
@@ skipping 434 matching lines @@
   Zone zone_;
   unsigned info_zone_start_allocation_size_;
   base::ElapsedTimer timer_;
 
   DISALLOW_COPY_AND_ASSIGN(CompilationPhase);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_COMPILER_H_