Avoid accessing Isolate in source position logging.

src/full-codegen/full-codegen.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_FULL_CODEGEN_FULL_CODEGEN_H_
 #define V8_FULL_CODEGEN_FULL_CODEGEN_H_
 
 #include "src/allocation.h"
 #include "src/assert-scope.h"
 #include "src/ast/ast.h"
@@ skipping 28 matching lines @@
         loop_depth_(0),
         operand_stack_depth_(0),
         globals_(NULL),
         context_(NULL),
         bailout_entries_(info->HasDeoptimizationSupport()
                              ? info->literal()->ast_node_count()
                              : 0,
                          info->zone()),
         back_edges_(2, info->zone()),
         handler_table_(info->zone()),
-        source_position_table_builder_(info->isolate(), info->zone(),
+        source_position_table_builder_(info->zone(),
                                        info->SourcePositionRecordingMode()),
         ic_total_count_(0) {
     DCHECK(!info->IsStub());
     Initialize();
   }
 
   void Initialize();
 
   static bool MakeCode(CompilationInfo* info);
 
@@ skipping 978 matching lines @@
   Address start_;
   Address instruction_start_;
   uint32_t length_;
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_FULL_CODEGEN_FULL_CODEGEN_H_