Fix clang compiler warning.

runtime/vm/raw_object.h

 // 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.
 
 #ifndef VM_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/atomic.h"
 #include "vm/globals.h"
@@ skipping 1005 matching lines @@
     kRuntimeCall     = kClosureCall << 1,  // Runtime call.
     kOsrEntry        = kRuntimeCall << 1,  // OSR entry point in unopt. code.
     kOther           = kOsrEntry << 1,
     kAnyKind         = 0xFF
   };
 
   // Compressed version assumes try_index is always -1 and does not store it.
   struct PcDescriptorRec {
     uword pc_offset() const { return pc_offset_; }
     void set_pc_offset(uword value) {
-      ASSERT((sizeof(value) == 4) || Utils::IsUint(32, value));
+      ASSERT((sizeof(value) == 4) || (value < static_cast<uword>(1) << 32));
       pc_offset_ = value;
     }
 
     Kind kind() const {
       return static_cast<Kind>(deopt_id_and_kind_ & kAnyKind);
     }
     void set_kind(Kind kind) {
       deopt_id_and_kind_ = (deopt_id_and_kind_ & 0xFFFFFF00) | kind;
     }
 
@@ skipping 1119 matching lines @@
   COMPILE_ASSERT(kExternalTypedDataInt8ArrayCid ==
                  kTypedDataInt8ArrayViewCid + 15);
   COMPILE_ASSERT(kByteBufferCid == kExternalTypedDataInt8ArrayCid + 14);
   COMPILE_ASSERT(kNullCid == kByteBufferCid + 1);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_