Remove some uses of STL map.

runtime/vm/assembler.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/assembler.h"
 
 #include "platform/utils.h"
 #include "vm/cpu.h"
 #include "vm/heap.h"
 #include "vm/memory_region.h"
@@ skipping 257 matching lines @@
   }
   return object_pool_.length() - 1;
 }
 
 
 intptr_t ObjectPoolWrapper::FindObject(ObjectPoolWrapperEntry entry,
                                        Patchability patchable) {
   // If the object is not patchable, check if we've already got it in the
   // object pool.
   if (patchable == kNotPatchable) {
-    intptr_t idx = object_pool_index_table_.Lookup(entry);
+    intptr_t idx = object_pool_index_table_.LookupValue(entry);
     if (idx != ObjIndexPair::kNoIndex) {
       return idx;
     }
   }
   return AddObject(entry, patchable);
 }
 
 
 intptr_t ObjectPoolWrapper::FindObject(const Object& obj,
                                        Patchability patchable) {
@@ skipping 35 matching lines @@
       result.SetObjectAt(i, *object_pool_[i].obj_);
     } else {
       result.SetRawValueAt(i, object_pool_[i].raw_value_);
     }
   }
   return result.raw();
 }
 
 
 }  // namespace dart