VM: Const-correctness fixes.

runtime/vm/raw_object.cc

 // Copyright (c) 2012, 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 "vm/raw_object.h"
 
 #include "vm/class_table.h"
 #include "vm/dart.h"
 #include "vm/freelist.h"
 #include "vm/isolate.h"
@@ skipping 147 matching lines @@
       break;
     }
     case kExceptionHandlersCid: {
       const RawExceptionHandlers* raw_handlers =
           reinterpret_cast<const RawExceptionHandlers*>(this);
       intptr_t num_handlers = raw_handlers->ptr()->num_entries_;
       instance_size = ExceptionHandlers::InstanceSize(num_handlers);
       break;
     }
     case kFreeListElement: {
-      uword addr = RawObject::ToAddr(const_cast<RawObject*>(this));
+      uword addr = RawObject::ToAddr(this);
       FreeListElement* element = reinterpret_cast<FreeListElement*>(addr);
       instance_size = element->Size();
       break;
     }
     default: {
       // Get the (constant) instance size out of the class object.
       // TODO(koda): Add Size(ClassTable*) interface to allow caching in loops.
       Isolate* isolate = Isolate::Current();
       ClassTable* class_table = isolate->class_table();
 #if defined(DEBUG)
@@ skipping 91 matching lines @@
       case kTypedData##clazz##ViewCid:
       CLASS_LIST_TYPED_DATA(RAW_VISITPOINTERS)
       case kByteDataViewCid:
       case kByteBufferCid: {
         RawInstance* raw_obj = reinterpret_cast<RawInstance*>(this);
         size = RawInstance::VisitInstancePointers(raw_obj, visitor);
         break;
       }
 #undef RAW_VISITPOINTERS
       case kFreeListElement: {
-        uword addr = RawObject::ToAddr(const_cast<RawObject*>(this));
+        uword addr = RawObject::ToAddr(this);
         FreeListElement* element = reinterpret_cast<FreeListElement*>(addr);
         size = element->Size();
         break;
       }
       case kNullCid:
         size = Size();
         break;
       default:
         OS::Print("Class Id: %" Pd "\n", class_id);
         UNREACHABLE();
         break;
     }
   } else {
     RawInstance* raw_obj = reinterpret_cast<RawInstance*>(this);
     size = RawInstance::VisitInstancePointers(raw_obj, visitor);
   }
 
   ASSERT(size != 0);
   ASSERT(size == Size());
   return size;
 }
 
 
 bool RawObject::FindObject(FindObjectVisitor* visitor) {
   ASSERT(visitor != NULL);
-  return visitor->FindObject(const_cast<RawObject*>(this));
+  return visitor->FindObject(this);
 }
 
 
 intptr_t RawClass::VisitClassPointers(RawClass* raw_obj,
                                       ObjectPointerVisitor* visitor) {
   visitor->VisitPointers(raw_obj->from(), raw_obj->to());
   return Class::InstanceSize();
 }
 
 
@@ skipping 617 matching lines @@
 intptr_t RawUserTag::VisitUserTagPointers(
     RawUserTag* raw_obj, ObjectPointerVisitor* visitor) {
   // Make sure that we got here with the tagged pointer as this.
   ASSERT(raw_obj->IsHeapObject());
   visitor->VisitPointers(raw_obj->from(), raw_obj->to());
   return UserTag::InstanceSize();
 }
 
 
 }  // namespace dart