[turbofan] Remove obsolete JSTypeFeedbackSpecializer and JSTypeFeedbackLowering.

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 104 matching lines @@
     kDeoptimizationSupport = 1 << 5,
     kDebug = 1 << 6,
     kSerializing = 1 << 7,
     kFunctionContextSpecializing = 1 << 8,
     kFrameSpecializing = 1 << 9,
     kNativeContextSpecializing = 1 << 10,
     kInliningEnabled = 1 << 11,
     kTypingEnabled = 1 << 12,
     kDisableFutureOptimization = 1 << 13,
     kSplittingEnabled = 1 << 14,
-    kTypeFeedbackEnabled = 1 << 15,
     kDeoptimizationEnabled = 1 << 16,
     kSourcePositionsEnabled = 1 << 17,
     kFirstCompile = 1 << 18,
   };
 
   explicit CompilationInfo(ParseInfo* parse_info);
   CompilationInfo(CodeStub* stub, Isolate* isolate, Zone* zone);
   CompilationInfo(const char* debug_name, Isolate* isolate, Zone* zone);
   virtual ~CompilationInfo();
 
@@ skipping 96 matching lines @@
   bool is_frame_specializing() const { return GetFlag(kFrameSpecializing); }
 
   void MarkAsNativeContextSpecializing() {
     SetFlag(kNativeContextSpecializing);
   }
 
   bool is_native_context_specializing() const {
     return GetFlag(kNativeContextSpecializing);
   }
 
-  void MarkAsTypeFeedbackEnabled() { SetFlag(kTypeFeedbackEnabled); }
-
-  bool is_type_feedback_enabled() const {
-    return GetFlag(kTypeFeedbackEnabled);
-  }
-
   void MarkAsDeoptimizationEnabled() { SetFlag(kDeoptimizationEnabled); }
 
   bool is_deoptimization_enabled() const {
     return GetFlag(kDeoptimizationEnabled);
   }
 
   void MarkAsSourcePositionsEnabled() { SetFlag(kSourcePositionsEnabled); }
 
   bool is_source_positions_enabled() const {
     return GetFlag(kSourcePositionsEnabled);
@@ skipping 471 matching lines @@
   size_t info_zone_start_allocation_size_;
   base::ElapsedTimer timer_;
 
   DISALLOW_COPY_AND_ASSIGN(CompilationPhase);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_H_