DBC: Enable CpuInfo test

runtime/vm/cpu_dbc.cc

 // Copyright (c) 2016, 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/globals.h"
 #if defined(TARGET_ARCH_DBC)
 
 #include "vm/cpu.h"
+#include "vm/cpu_dbc.h"
 
+#include "vm/cpuinfo.h"
 
 namespace dart {
 
-
 void CPU::FlushICache(uword start, uword size) {
   // Nothing to do.
 }
 
 
 const char* CPU::Id() {
   return "dbc";
 }
 
 
+const char* HostCPUFeatures::hardware_ = NULL;
+#if defined(DEBUG)
+bool HostCPUFeatures::initialized_ = false;
+#endif
+
+void HostCPUFeatures::InitOnce() {
+  CpuInfo::InitOnce();
+  hardware_ = CpuInfo::GetCpuModel();
+#if defined(DEBUG)
+  initialized_ = true;
+#endif
+}
+
+
+void HostCPUFeatures::Cleanup() {
+  DEBUG_ASSERT(initialized_);
+#if defined(DEBUG)
+  initialized_ = false;
+#endif
+  ASSERT(hardware_ != NULL);
+  free(const_cast<char*>(hardware_));
+  hardware_ = NULL;
+  CpuInfo::Cleanup();
+}
+
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_DBC