Replace (most) occurrences of mojo::Array<T>() with nullptr.

services/files/directory_impl.cc

 // Copyright 2015 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 "services/files/directory_impl.h"
 
 #include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
@@ skipping 97 matching lines @@
 
 void DirectoryImpl::Read(const ReadCallback& callback) {
   static const size_t kMaxReadCount = 1000;
 
   DCHECK(dir_fd_.is_valid());
 
   // |fdopendir()| takes ownership of the FD (giving it to the |DIR| --
   // |closedir()| will close the FD)), so we need to |dup()| ours.
   base::ScopedFD fd(dup(dir_fd_.get()));
   if (!fd.is_valid()) {
-    callback.Run(ErrnoToError(errno), Array<DirectoryEntryPtr>());
+    callback.Run(ErrnoToError(errno), nullptr);
     return;
   }
 
   ScopedDIR dir(fdopendir(fd.release()));
   if (!dir) {
-    callback.Run(ErrnoToError(errno), Array<DirectoryEntryPtr>());
+    callback.Run(ErrnoToError(errno), nullptr);
     return;
   }
 
   auto result = Array<DirectoryEntryPtr>::New(0);
 
 // Warning: This is not portable (per POSIX.1 -- |buffer| may not be large
 // enough), but it's fine for Linux.
 #if !defined(OS_ANDROID) && !defined(OS_LINUX)
 #error "Use of struct dirent for readdir_r() buffer not portable; please check."
 #endif
   struct dirent buffer;
   for (size_t n = 0;;) {
     struct dirent* entry = nullptr;
     if (int error = readdir_r(dir.get(), &buffer, &entry)) {
       // |error| is effectively an errno (for |readdir_r()|), AFAICT.
-      callback.Run(ErrnoToError(error), Array<DirectoryEntryPtr>());
+      callback.Run(ErrnoToError(error), nullptr);
       return;
     }
 
     if (!entry)
       break;
 
     n++;
     if (n > kMaxReadCount) {
       LOG(WARNING) << "Directory contents truncated";
       callback.Run(Error::OUT_OF_RANGE, result.Pass());
@@ skipping 202 matching lines @@
   if (unlinkat(dir_fd_.get(), path.get().c_str(), AT_REMOVEDIR) == 0) {
     callback.Run(Error::OK);
     return;
   }
 
   callback.Run(ErrnoToError(errno));
 }
 
 }  // namespace files
 }  // namespace mojo