Fuchsia: Make some more VM tests pass

runtime/platform/utils_fuchsia.h

 // 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.
 
 #ifndef PLATFORM_UTILS_FUCHSIA_H_
 #define PLATFORM_UTILS_FUCHSIA_H_
 
-#include "platform/assert.h"
+#include <endian.h>
 
 namespace dart {
 
 inline int Utils::CountLeadingZeros(uword x) {
 #if defined(ARCH_IS_32_BIT)
   return __builtin_clzl(x);
 #elif defined(ARCH_IS_64_BIT)
   return __builtin_clzll(x);
 #else
 #error Architecture is not 32-bit or 64-bit.
 #endif
 }
 
 
 inline int Utils::CountTrailingZeros(uword x) {
 #if defined(ARCH_IS_32_BIT)
   return __builtin_ctzl(x);
 #elif defined(ARCH_IS_64_BIT)
   return __builtin_ctzll(x);
 #else
 #error Architecture is not 32-bit or 64-bit.
 #endif
 }
 
 
 inline uint16_t Utils::HostToBigEndian16(uint16_t value) {
-  UNIMPLEMENTED();
-  return 0;
+  return htobe16(value);
 }
 
 
 inline uint32_t Utils::HostToBigEndian32(uint32_t value) {
-  UNIMPLEMENTED();
-  return 0;
+  return htobe32(value);
 }
 
 
 inline uint64_t Utils::HostToBigEndian64(uint64_t value) {
-  UNIMPLEMENTED();
-  return 0;
+  return htobe64(value);
 }
 
 
 inline uint16_t Utils::HostToLittleEndian16(uint16_t value) {
-  UNIMPLEMENTED();
-  return 0;
+  return htole16(value);
 }
 
 
 inline uint32_t Utils::HostToLittleEndian32(uint32_t value) {
-  UNIMPLEMENTED();
-  return 0;
+  return htole32(value);
 }
 
 
 inline uint64_t Utils::HostToLittleEndian64(uint64_t value) {
-  UNIMPLEMENTED();
-  return 0;
+  return htole64(value);
 }
 
 
 inline char* Utils::StrError(int err, char* buffer, size_t bufsize) {
   snprintf(buffer, bufsize, "errno = %d", err);
   return buffer;
 }
 
 }  // namespace dart
 
 #endif  // PLATFORM_UTILS_FUCHSIA_H_