[cleanup] Drop some dead code from Crankshaft.

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 1361 matching lines @@
 
   HValue* BuildCheckAndGrowElementsCapacity(HValue* object, HValue* elements,
                                             ElementsKind kind, HValue* length,
                                             HValue* capacity, HValue* key);
 
   HValue* BuildCopyElementsOnWrite(HValue* object,
                                    HValue* elements,
                                    ElementsKind kind,
                                    HValue* length);
 
-  void BuildTransitionElementsKind(HValue* object,
-                                   HValue* map,
-                                   ElementsKind from_kind,
-                                   ElementsKind to_kind,
-                                   bool is_jsarray);
-
   HValue* BuildNumberToString(HValue* object, AstType* type);
   HValue* BuildToNumber(HValue* input);
   HValue* BuildToObject(HValue* receiver);
 
-  HValue* BuildUncheckedDictionaryElementLoad(HValue* receiver,
-                                              HValue* elements, HValue* key,
-                                              HValue* hash);
-
   // ES6 section 7.4.7 CreateIterResultObject ( value, done )
   HValue* BuildCreateIterResultObject(HValue* value, HValue* done);
 
   // Allocates a new object according with the given allocation properties.
   HAllocate* BuildAllocate(HValue* object_size,
                            HType type,
                            InstanceType instance_type,
                            HAllocationMode allocation_mode);
   // Computes the sum of two string lengths, taking care of overflow handling.
   HValue* BuildAddStringLengths(HValue* left_length, HValue* right_length);
@@ skipping 62 matching lines @@
                                HAllocationMode allocation_mode,
                                BailoutId opt_id = BailoutId::None());
 
   HLoadNamedField* AddLoadFixedArrayLength(HValue *object,
                                            HValue *dependency = NULL);
 
   HLoadNamedField* AddLoadArrayLength(HValue *object,
                                       ElementsKind kind,
                                       HValue *dependency = NULL);
 
-  HValue* AddLoadJSBuiltin(int context_index);
-
   HValue* EnforceNumberType(HValue* number, AstType* expected);
   HValue* TruncateToNumber(HValue* value, AstType** expected);
 
   void FinishExitWithHardDeoptimization(DeoptimizeReason reason);
 
   void AddIncrementCounter(StatsCounter* counter);
 
   class IfBuilder final {
    public:
     // If using this constructor, Initialize() must be called explicitly!
@@ skipping 300 matching lines @@
   void BuildCopyProperties(HValue* from_properties, HValue* to_properties,
                            HValue* length, HValue* capacity);
 
   void BuildCopyElements(HValue* from_elements,
                          ElementsKind from_elements_kind,
                          HValue* to_elements,
                          ElementsKind to_elements_kind,
                          HValue* length,
                          HValue* capacity);
 
-  HValue* BuildElementIndexHash(HValue* index);
-
   void BuildCreateAllocationMemento(HValue* previous_object,
                                     HValue* previous_object_size,
                                     HValue* payload);
 
   HInstruction* BuildConstantMapCheck(Handle<JSObject> constant,
                                       bool ensure_no_elements = false);
   HInstruction* BuildCheckPrototypeMaps(Handle<JSObject> prototype,
                                         Handle<JSObject> holder,
                                         bool ensure_no_elements = false);
 
-  HInstruction* BuildGetNativeContext(HValue* closure);
   HInstruction* BuildGetNativeContext();
 
-  // Builds a loop version if |depth| is specified or unrolls the loop to
-  // |depth_value| iterations otherwise.
-  HValue* BuildGetParentContext(HValue* depth, int depth_value);
-
-  HInstruction* BuildGetArrayFunction();
   HValue* BuildArrayBufferViewFieldAccessor(HValue* object,
                                             HValue* checked_object,
                                             FieldIndex index);
 
 
  protected:
   void SetSourcePosition(int position) {
     if (position != kNoSourcePosition) {
       position_.SetScriptOffset(position);
     }
@@ skipping 1177 matching lines @@
   }
 
  private:
   HOptimizedGraphBuilder* builder_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_HYDROGEN_H_