Unify internal and external typed arrays a bit

src/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_HYDROGEN_H_
 #define V8_HYDROGEN_H_
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
@@ skipping 1877 matching lines @@
   // same function as current position_.
   SourcePosition ScriptPositionToSourcePosition(int position) {
     SourcePosition pos = position_;
     pos.set_position(position - start_position_);
     return pos;
   }
 
   SourcePosition source_position() { return position_; }
   void set_source_position(SourcePosition position) { position_ = position; }
 
+  HValue* BuildAllocateEmptyArrayBuffer(HValue* byte_length);
   template <typename ViewClass>
   void BuildArrayBufferViewInitialization(HValue* obj,
                                           HValue* buffer,
                                           HValue* byte_offset,
                                           HValue* byte_length);
 
  private:
   HGraphBuilder();
 
   template <class I>
@@ skipping 1140 matching lines @@
   }
 
  private:
   HGraphBuilder* builder_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_