Remove obsolete Code::optimizable flag.

src/objects.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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 5323 matching lines @@
   // [is_turbofanned]: For kind STUB or OPTIMIZED_FUNCTION, tells whether the
   // code object was generated by the TurboFan optimizing compiler.
   inline bool is_turbofanned();
   inline void set_is_turbofanned(bool value);
 
   // [can_have_weak_objects]: For kind OPTIMIZED_FUNCTION, tells whether the
   // embedded objects in code should be treated weakly.
   inline bool can_have_weak_objects();
   inline void set_can_have_weak_objects(bool value);
 
-  // [optimizable]: For FUNCTION kind, tells if it is optimizable.
-  inline bool optimizable();
-  inline void set_optimizable(bool value);
-
   // [has_deoptimization_support]: For FUNCTION kind, tells if it has
   // deoptimization support.
   inline bool has_deoptimization_support();
   inline void set_has_deoptimization_support(bool value);
 
   // [has_debug_break_slots]: For FUNCTION kind, tells if it has
   // been compiled with debug break slots.
   inline bool has_debug_break_slots();
   inline void set_has_debug_break_slots(bool value);
 
@@ skipping 285 matching lines @@
   static const int kHeaderPaddingStart = kConstantPoolOffset + kPointerSize;
 
   // Add padding to align the instruction start following right after
   // the Code object header.
   static const int kHeaderSize =
       (kHeaderPaddingStart + kCodeAlignmentMask) & ~kCodeAlignmentMask;
   // Ensure that the slot for the constant pool pointer is aligned.
   STATIC_ASSERT((kConstantPoolOffset & kPointerAlignmentMask) == 0);
 
   // Byte offsets within kKindSpecificFlags1Offset.
-  static const int kOptimizableOffset = kKindSpecificFlags1Offset;
-
-  static const int kFullCodeFlags = kOptimizableOffset + 1;
+  static const int kFullCodeFlags = kKindSpecificFlags1Offset;
   class FullCodeFlagsHasDeoptimizationSupportField:
       public BitField<bool, 0, 1> {};  // NOLINT
   class FullCodeFlagsHasDebugBreakSlotsField: public BitField<bool, 1, 1> {};
   class FullCodeFlagsIsCompiledOptimizable: public BitField<bool, 2, 1> {};
   class FullCodeFlagsHasRelocInfoForSerialization
       : public BitField<bool, 3, 1> {};
 
   static const int kProfilerTicksOffset = kFullCodeFlags + 1;
 
   // Flags layout.  BitField<type, shift, size>.
@@ skipping 5465 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_