Fixes some memory leaks in //runtime/bin

runtime/bin/crypto_linux.cc

 // 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.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_LINUX)
 
 #include <errno.h>  // NOLINT
 #include <fcntl.h>  // NOLINT
 
 #include "bin/fdutils.h"
 #include "bin/crypto.h"
 #include "platform/signal_blocker.h"
 
-
 namespace dart {
 namespace bin {
 
 bool Crypto::GetRandomBytes(intptr_t count, uint8_t* buffer) {
   ThreadSignalBlocker signal_blocker(SIGPROF);
   intptr_t fd = TEMP_FAILURE_RETRY_NO_SIGNAL_BLOCKER(
       open("/dev/urandom", O_RDONLY));
-  if (fd < 0) return false;
+  if (fd < 0) {
+    return false;
+  }
   intptr_t bytes_read = 0;
   do {
     int res = TEMP_FAILURE_RETRY_NO_SIGNAL_BLOCKER(
         read(fd, buffer + bytes_read, count - bytes_read));
     if (res < 0) {
       int err = errno;
       VOID_TEMP_FAILURE_RETRY_NO_SIGNAL_BLOCKER(close(fd));
       errno = err;
       return false;
     }
     bytes_read += res;
   } while (bytes_read < count);
   VOID_TEMP_FAILURE_RETRY_NO_SIGNAL_BLOCKER(close(fd));
   return true;
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_LINUX)