Add Android-specific platform guards to Chromium's LevelDB environment.

third_party/leveldatabase/env_chromium.cc

 // Copyright (c) 2011 The LevelDB Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file. See the AUTHORS file for names of contributors.
 
 #include <deque>
 #include <errno.h>
 #include <stdio.h>
 #include "base/at_exit.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
@@ skipping 12 matching lines @@
 #include "leveldb/env.h"
 #include "leveldb/slice.h"
 #include "port/port.h"
 #include "util/logging.h"
 
 #if defined(OS_WIN)
 #include <io.h>
 #include "base/win/win_util.h"
 #endif
 
-#if defined(OS_MACOSX) || defined(OS_WIN)
+#if defined(OS_MACOSX) || defined(OS_WIN) || defined(OS_ANDROID)
 // The following are glibc-specific
 namespace {
 
 size_t fread_unlocked(void *ptr, size_t size, size_t n, FILE *file) {
   return fread(ptr, size, n, file);
 }
 
 size_t fwrite_unlocked(const void *ptr, size_t size, size_t n, FILE *file) {
   return fwrite(ptr, size, n, file);
 }
 
 int fflush_unlocked(FILE *file) {
   return fflush(file);
 }
 
+#if !defined(OS_ANDROID)
 int fdatasync(int fildes) {
 #if defined(OS_WIN)
   return _commit(fildes);
 #else
   return fsync(fildes);
 #endif
 }
+#endif
 
 }
 #endif
 
 namespace leveldb {
 
 namespace {
 
 class Thread;
 
@@ skipping 468 matching lines @@
 ::base::LazyInstance<ChromiumEnv, ::base::LeakyLazyInstanceTraits<ChromiumEnv> >
     default_env(::base::LINKER_INITIALIZED);
 
 }
 
 Env* Env::Default() {
   return default_env.Pointer();
 }
 
 }