Adaptively use temp dir instead of /dev/shm for executable shmem file on Linux

base/file_util_win.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/file_util.h"
 
 #include <windows.h>
 #include <propvarutil.h>
 #include <psapi.h>
 #include <shellapi.h>
@@ skipping 538 matching lines @@
   DWORD path_len = ::GetTempPath(MAX_PATH, temp_path);
   if (path_len >= MAX_PATH || path_len <= 0)
     return false;
   // TODO(evanm): the old behavior of this function was to always strip the
   // trailing slash.  We duplicate this here, but it shouldn't be necessary
   // when everyone is using the appropriate FilePath APIs.
   *path = FilePath(temp_path).StripTrailingSeparators();
   return true;
 }
 
-bool GetShmemTempDir(FilePath* path) {
+bool GetShmemTempDir(FilePath* path, bool executable) {
   return GetTempDir(path);
 }
 
 bool CreateTemporaryFile(FilePath* path) {
   base::ThreadRestrictions::AssertIOAllowed();
 
   FilePath temp_file;
 
   if (!GetTempDir(path))
     return false;
 
   if (CreateTemporaryFileInDir(*path, &temp_file)) {
     *path = temp_file;
     return true;
   }
 
   return false;
 }
 
-FILE* CreateAndOpenTemporaryShmemFile(FilePath* path) {
+FILE* CreateAndOpenTemporaryShmemFile(FilePath* path, bool executable) {
   base::ThreadRestrictions::AssertIOAllowed();
   return CreateAndOpenTemporaryFile(path);
 }
 
 // On POSIX we have semantics to create and open a temporary file
 // atomically.
 // TODO(jrg): is there equivalent call to use on Windows instead of
 // going 2-step?
 FILE* CreateAndOpenTemporaryFileInDir(const FilePath& dir, FilePath* path) {
   base::ThreadRestrictions::AssertIOAllowed();
@@ skipping 570 matching lines @@
       uint8 unused = *(touch + offset);
       offset += step_size;
     }
     FreeLibrary(dll_module);
   }
 
   return true;
 }
 
 }  // namespace file_util