1. Fix memory leaks reported by running a simple test using ASAN

runtime/vm/cpuid.h

 // Copyright (c) 2014, 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_CPUID_H_
 #define VM_CPUID_H_
 
 #include "vm/globals.h"
 #if !defined(TARGET_OS_MACOS)
 #include "vm/allocation.h"
 #include "vm/cpuinfo.h"
 
 namespace dart {
 
 class CpuId : public AllStatic {
  public:
 #if defined(HOST_ARCH_IA32) || defined(HOST_ARCH_X64)
   static void InitOnce();
   static void Cleanup();
 
   // Caller must free the result of field.
   static const char* field(CpuInfoIndices idx);
 #else
   static void InitOnce() {}
   static void Cleanup() {}
   static const char* field(CpuInfoIndices idx) { return NULL; }
 #endif
 
+ private:
+  // Caller must free the result of id_string and brand_string.
+  static const char* id_string();
+  static const char* brand_string();
+
   static bool sse2() { return sse2_; }
   static bool sse41() { return sse41_; }
 
-  // Caller must free the result of id_string and brand_string.
-  static const char* id_string();
-  static const char* brand_string();
-
- private:
   static bool sse2_;
   static bool sse41_;
   static const char* id_string_;
   static const char* brand_string_;
 
   static void GetCpuId(int32_t level, uint32_t info[4]);
 };
 
 }  // namespace dart
 
 #endif  // !defined(TARGET_OS_MACOS)
 #endif  // VM_CPUID_H_