Reland: [Parse] ParseInfo owns the parsing Zone.

src/crankshaft/hydrogen.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_CRANKSHAFT_HYDROGEN_H_
 #define V8_CRANKSHAFT_HYDROGEN_H_
 
 #include "src/accessors.h"
 #include "src/allocation.h"
 #include "src/ast/ast-type-bounds.h"
@@ skipping 19 matching lines @@
 class HOsrBuilder;
 class HTracer;
 class LAllocator;
 class LChunk;
 class LiveRange;
 
 class HCompilationJob final : public CompilationJob {
  public:
   explicit HCompilationJob(Handle<JSFunction> function)
       : CompilationJob(function->GetIsolate(), &info_, "Crankshaft"),
-        zone_(function->GetIsolate()->allocator(), ZONE_NAME),
-        parse_info_(&zone_, handle(function->shared())),
+        parse_info_(handle(function->shared())),
         info_(&parse_info_, function),
         graph_(nullptr),
         chunk_(nullptr) {}
 
  protected:
   virtual Status PrepareJobImpl();
   virtual Status ExecuteJobImpl();
   virtual Status FinalizeJobImpl();
 
  private:
-  Zone zone_;
   ParseInfo parse_info_;
   CompilationInfo info_;
   HGraph* graph_;
   LChunk* chunk_;
 };
 
 class HBasicBlock final : public ZoneObject {
  public:
   explicit HBasicBlock(HGraph* graph);
   ~HBasicBlock() { }
@@ skipping 2933 matching lines @@
   }
 
  private:
   HOptimizedGraphBuilder* builder_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_HYDROGEN_H_