Revert the change adding CompilationHandleScope.

src/compiler.h

 // 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 27 matching lines @@
 class ScriptDataImpl;
 
 // CompilationInfo encapsulates some information known at compile time.  It
 // is constructed based on the resources available at compile-time.
 class CompilationInfo BASE_EMBEDDED {
  public:
   CompilationInfo(Handle<Script> script, Zone* zone);
   CompilationInfo(Handle<SharedFunctionInfo> shared_info, Zone* zone);
   CompilationInfo(Handle<JSFunction> closure, Zone* zone);
 
-  ~CompilationInfo();
-
   Isolate* isolate() {
     ASSERT(Isolate::Current() == isolate_);
     return isolate_;
   }
   Zone* zone() {
     return zone_;
   }
   bool is_lazy() const { return IsLazy::decode(flags_); }
   bool is_eval() const { return IsEval::decode(flags_); }
   bool is_global() const { return IsGlobal::decode(flags_); }
@@ skipping 108 matching lines @@
     flags_ |= SupportsDeoptimization::encode(true);
   }
 
   // Determines whether or not to insert a self-optimization header.
   bool ShouldSelfOptimize();
 
   // Disable all optimization attempts of this info for the rest of the
   // current compilation pipeline.
   void AbortOptimization();
 
-  void set_deferred_handles(DeferredHandles* deferred_handles) {
-    ASSERT(deferred_handles_ == NULL);
-    deferred_handles_ = deferred_handles;
-  }
-
  private:
   Isolate* isolate_;
 
   // Compilation mode.
   // BASE is generated by the full codegen, optionally prepared for bailouts.
   // OPTIMIZE is optimized code generated by the Hydrogen-based backend.
   // NONOPT is generated by the full codegen and is not prepared for
   //   recompilation/bailouts.  These functions are never recompiled.
   enum Mode {
     BASE,
@@ skipping 66 matching lines @@
   Handle<Context> calling_context_;
 
   // Compilation mode flag and whether deoptimization is allowed.
   Mode mode_;
   int osr_ast_id_;
 
   // The zone from which the compilation pipeline working on this
   // CompilationInfo allocates.
   Zone* zone_;
 
-  DeferredHandles* deferred_handles_;
-
   DISALLOW_COPY_AND_ASSIGN(CompilationInfo);
 };
 
 
 // Exactly like a CompilationInfo, except also creates and enters a
 // Zone on construction and deallocates it on exit.
 class CompilationInfoWithZone: public CompilationInfo {
  public:
   explicit CompilationInfoWithZone(Handle<Script> script)
       : CompilationInfo(script, &zone_),
         zone_(script->GetIsolate()),
         zone_scope_(&zone_, DELETE_ON_EXIT) {}
   explicit CompilationInfoWithZone(Handle<SharedFunctionInfo> shared_info)
       : CompilationInfo(shared_info, &zone_),
         zone_(shared_info->GetIsolate()),
         zone_scope_(&zone_, DELETE_ON_EXIT) {}
   explicit CompilationInfoWithZone(Handle<JSFunction> closure)
       : CompilationInfo(closure, &zone_),
         zone_(closure->GetIsolate()),
         zone_scope_(&zone_, DELETE_ON_EXIT) {}
 
  private:
   Zone zone_;
   ZoneScope zone_scope_;
 };
 
 
-// A wrapper around a CompilationInfo that detaches the Handles from
-// the underlying DeferredHandleScope and stores them in info_ on
-// destruction.
-class CompilationHandleScope BASE_EMBEDDED {
- public:
-  explicit CompilationHandleScope(CompilationInfo* info)
-      : deferred_(info->isolate()), info_(info) {}
-  ~CompilationHandleScope() {
-    info_->set_deferred_handles(deferred_.Detach());
-  }
-
- private:
-  DeferredHandleScope deferred_;
-  CompilationInfo* info_;
-};
-
-
 // The V8 compiler
 //
 // General strategy: Source code is translated into an anonymous function w/o
 // parameters which then can be executed. If the source code contains other
 // functions, they will be compiled and allocated as part of the compilation
 // of the source code.
 
 // Please note this interface returns shared function infos.  This means you
 // need to call Factory::NewFunctionFromSharedFunctionInfo before you have a
 // real function with a context.
@@ skipping 51 matching lines @@
 
   static void RecordFunctionCompilation(Logger::LogEventsAndTags tag,
                                         CompilationInfo* info,
                                         Handle<SharedFunctionInfo> shared);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_COMPILER_H_