Revert r13901 to reland with proper credit to external contributor.

src/assembler.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 298 matching lines @@
   }
   static inline bool IsConstructCall(Mode mode) {
     return mode == CONSTRUCT_CALL;
   }
   static inline bool IsCodeTarget(Mode mode) {
     return mode <= LAST_CODE_ENUM;
   }
   static inline bool IsEmbeddedObject(Mode mode) {
     return mode == EMBEDDED_OBJECT;
   }
-  static inline bool IsRuntimeEntry(Mode mode) {
-    return mode == RUNTIME_ENTRY;
-  }
   // Is the relocation mode affected by GC?
   static inline bool IsGCRelocMode(Mode mode) {
     return mode <= LAST_GCED_ENUM;
   }
   static inline bool IsJSReturn(Mode mode) {
     return mode == JS_RETURN;
   }
   static inline bool IsComment(Mode mode) {
     return mode == COMMENT;
   }
@@ skipping 43 matching lines @@
   // this relocation applies to;
   // can only be called if IsCodeTarget(rmode_) || rmode_ == RUNTIME_ENTRY
   INLINE(Address target_address());
   INLINE(void set_target_address(Address target,
                                  WriteBarrierMode mode = UPDATE_WRITE_BARRIER));
   INLINE(Object* target_object());
   INLINE(Handle<Object> target_object_handle(Assembler* origin));
   INLINE(Object** target_object_address());
   INLINE(void set_target_object(Object* target,
                                 WriteBarrierMode mode = UPDATE_WRITE_BARRIER));
-  INLINE(Address target_runtime_entry(Assembler* origin));
-  INLINE(void set_target_runtime_entry(Address target,
-                                       WriteBarrierMode mode =
-                                           UPDATE_WRITE_BARRIER));
   INLINE(JSGlobalPropertyCell* target_cell());
   INLINE(Handle<JSGlobalPropertyCell> target_cell_handle());
   INLINE(void set_target_cell(JSGlobalPropertyCell* cell,
                               WriteBarrierMode mode = UPDATE_WRITE_BARRIER));
   INLINE(Code* code_age_stub());
   INLINE(void set_code_age_stub(Code* stub));
 
   // Read the address of the word containing the target_address in an
   // instruction stream.  What this means exactly is architecture-independent.
   // The only architecture-independent user of this function is the serializer.
@@ skipping 624 matching lines @@
  public:
   NullCallWrapper() { }
   virtual ~NullCallWrapper() { }
   virtual void BeforeCall(int call_size) const { }
   virtual void AfterCall() const { }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ASSEMBLER_H_