Revert commit 2701 per Erik Corry's request.

src/assembler.cc

 // 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 545 matching lines @@
 ExternalReference ExternalReference::random_positive_smi_function() {
   return ExternalReference(Redirect(FUNCTION_ADDR(V8::RandomPositiveSmi)));
 }
 
 
 ExternalReference ExternalReference::the_hole_value_location() {
   return ExternalReference(Factory::the_hole_value().location());
 }
 
 
-ExternalReference ExternalReference::roots_address() {
-  return ExternalReference(Heap::roots_address());
-}
-
-
 ExternalReference ExternalReference::address_of_stack_guard_limit() {
   return ExternalReference(StackGuard::address_of_jslimit());
 }
 
 
 ExternalReference ExternalReference::address_of_regexp_stack_limit() {
   return ExternalReference(RegExpStack::limit_address());
 }
 
 
@@ skipping 90 matching lines @@
   return ExternalReference(Redirect(FUNCTION_ADDR(Debug::Break)));
 }
 
 
 ExternalReference ExternalReference::debug_step_in_fp_address() {
   return ExternalReference(Debug::step_in_fp_addr());
 }
 #endif
 
 } }  // namespace v8::internal