Revert "Inline instance object hash code into object header on 64 bit."

runtime/vm/profiler.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/address_sanitizer.h"
 #include "platform/memory_sanitizer.h"
 #include "platform/utils.h"
 
 #include "vm/allocation.h"
 #include "vm/atomic.h"
@@ skipping 1304 matching lines @@
 
 class CodeLookupTableBuilder : public ObjectVisitor {
  public:
   explicit CodeLookupTableBuilder(CodeLookupTable* table) : table_(table) {
     ASSERT(table_ != NULL);
   }
 
   ~CodeLookupTableBuilder() {}
 
   void VisitObject(RawObject* raw_obj) {
-    uint32_t tags = raw_obj->ptr()->tags_;
+    uword tags = raw_obj->ptr()->tags_;
     if (RawObject::ClassIdTag::decode(tags) == kCodeCid) {
       RawCode* raw_code = reinterpret_cast<RawCode*>(raw_obj);
       const Code& code = Code::Handle(raw_code);
       ASSERT(!code.IsNull());
       const Instructions& instructions =
           Instructions::Handle(code.instructions());
       ASSERT(!instructions.IsNull());
       table_->Add(code);
     }
   }
@@ skipping 277 matching lines @@
 
 
 ProcessedSampleBuffer::ProcessedSampleBuffer()
     : code_lookup_table_(new CodeLookupTable(Thread::Current())) {
   ASSERT(code_lookup_table_ != NULL);
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart