Implement ScopedFD in terms of ScopedGeneric.

Move to a new file base/files/scoped_file.h. I will also add ScopedFILE to here (currently in file_util.h) later.

I think there is a crash in the old code in content/browser/zygote_host/zygote_host_impl_linux.cc that this patch should fix. The old ScopedFD took the address of something in a vector that is being modified.

I removed SafeScopedFD from content/common/sandbox_linux/sandbox_linux.cc since base's ScopedFD not CHECKs on close failure (this is a more recent addition).

BUG=
R=agl@chromium.org, viettrungluu@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=257001

Review URL: https://codereview.chromium.org/191673003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@257179 0039d316-1c4b-4281-b951-d872f2087c98

42 files changed, 332 insertions, 286 deletions

diff --git a/base/BUILD.gn b/base/BUILD.gn
index d676f05..d07e10b 100644
--- a/base/BUILD.gn
+++ b/base/BUILD.gn
@@ -180,6 +180,8 @@ component("base") {
     "files/memory_mapped_file.h",
     "files/memory_mapped_file_posix.cc",
     "files/memory_mapped_file_win.cc",
+    "files/scoped_file.cc",
+    "files/scoped_file.h",
     "files/scoped_temp_dir.cc",
     "files/scoped_temp_dir.h",
     "float_util.h",
diff --git a/base/base.gypi b/base/base.gypi
index 141e498..88b2422 100644
--- a/base/base.gypi
+++ b/base/base.gypi
@@ -219,6 +219,8 @@
           'files/memory_mapped_file.h',
           'files/memory_mapped_file_posix.cc',
           'files/memory_mapped_file_win.cc',
+          'files/scoped_file.cc',
+          'files/scoped_file.h',
           'files/scoped_platform_file_closer.cc',
           'files/scoped_platform_file_closer.h',
           'files/scoped_temp_dir.cc',
diff --git a/base/debug/proc_maps_linux.cc b/base/debug/proc_maps_linux.cc
index b7a5862..a956961 100644
--- a/base/debug/proc_maps_linux.cc
+++ b/base/debug/proc_maps_linux.cc
@@ -11,6 +11,7 @@
 #endif
 
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/strings/string_split.h"
 
 #if defined(OS_ANDROID)
@@ -45,12 +46,11 @@ bool ReadProcMaps(std::string* proc_maps) {
   // file for details.
   const long kReadSize = sysconf(_SC_PAGESIZE);
 
-  int fd = HANDLE_EINTR(open("/proc/self/maps", O_RDONLY));
-  if (fd == -1) {
+  base::ScopedFD fd(HANDLE_EINTR(open("/proc/self/maps", O_RDONLY)));
+  if (!fd.is_valid()) {
     DPLOG(ERROR) << "Couldn't open /proc/self/maps";
     return false;
   }
-  file_util::ScopedFD fd_closer(&fd);
   proc_maps->clear();
 
   while (true) {
@@ -60,7 +60,7 @@ bool ReadProcMaps(std::string* proc_maps) {
     proc_maps->resize(pos + kReadSize);
     void* buffer = &(*proc_maps)[pos];
 
-    ssize_t bytes_read = HANDLE_EINTR(read(fd, buffer, kReadSize));
+    ssize_t bytes_read = HANDLE_EINTR(read(fd.get(), buffer, kReadSize));
     if (bytes_read < 0) {
       DPLOG(ERROR) << "Couldn't read /proc/self/maps";
       proc_maps->clear();
diff --git a/base/file_util.h b/base/file_util.h
index 431569a..b86d8cb 100644
--- a/base/file_util.h
+++ b/base/file_util.h
@@ -426,32 +426,6 @@ struct ScopedFILEClose {
 // Automatically closes |FILE*|s.
 typedef scoped_ptr<FILE, ScopedFILEClose> ScopedFILE;
 
-#if defined(OS_POSIX)
-// Functor for |ScopedFD| (below).
-struct ScopedFDClose {
-  inline void operator()(int* x) const {
-    if (x && *x >= 0) {
-      // It's important to crash here.
-      // There are security implications to not closing a file descriptor
-      // properly. As file descriptors are "capabilities", keeping them open
-      // would make the current process keep access to a resource. Much of
-      // Chrome relies on being able to "drop" such access.
-      // It's especially problematic on Linux with the setuid sandbox, where
-      // a single open directory would bypass the entire security model.
-      PCHECK(0 == IGNORE_EINTR(close(*x)));
-    }
-  }
-};
-
-// Automatically closes FDs (note: doesn't store the FD).
-// TODO(viettrungluu): This is a very odd API, since (unlike |FILE*|s, you'll
-// need to store the FD separately and keep its memory alive). This should
-// probably be called |ScopedFDCloser| or something like that.
-typedef scoped_ptr<int, ScopedFDClose> ScopedFD;
-// Let new users use ScopedFDCloser already, while ScopedFD is replaced.
-typedef ScopedFD ScopedFDCloser;
-#endif  // OS_POSIX
-
 }  // namespace file_util
 
 // Internal --------------------------------------------------------------------
diff --git a/base/file_util_posix.cc b/base/file_util_posix.cc
index 7e7dc05..fb4ebcf 100644
--- a/base/file_util_posix.cc
+++ b/base/file_util_posix.cc
@@ -33,6 +33,7 @@
 #include "base/basictypes.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
+#include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
@@ -172,15 +173,15 @@ int CreateAndOpenFdForTemporaryFile(FilePath directory, FilePath* path) {
 bool DetermineDevShmExecutable() {
   bool result = false;
   FilePath path;
-  int fd = CreateAndOpenFdForTemporaryFile(FilePath("/dev/shm"), &path);
-  if (fd >= 0) {
-    file_util::ScopedFD shm_fd_closer(&fd);
+
+  ScopedFD fd(CreateAndOpenFdForTemporaryFile(FilePath("/dev/shm"), &path));
+  if (fd.is_valid()) {
     DeleteFile(path, false);
     long sysconf_result = sysconf(_SC_PAGESIZE);
     CHECK_GE(sysconf_result, 0);
     size_t pagesize = static_cast<size_t>(sysconf_result);
     CHECK_GE(sizeof(pagesize), sizeof(sysconf_result));
-    void *mapping = mmap(NULL, pagesize, PROT_READ, MAP_SHARED, fd, 0);
+    void *mapping = mmap(NULL, pagesize, PROT_READ, MAP_SHARED, fd.get(), 0);
     if (mapping != MAP_FAILED) {
       if (mprotect(mapping, pagesize, PROT_READ | PROT_EXEC) == 0)
         result = true;
@@ -660,11 +661,10 @@ bool GetFileInfo(const FilePath& file_path, File::Info* results) {
   stat_wrapper_t file_info;
 #if defined(OS_ANDROID)
   if (file_path.IsContentUri()) {
-    int fd = OpenContentUriForRead(file_path);
-    if (fd < 0)
+    ScopedFD fd(OpenContentUriForRead(file_path));
+    if (!fd.is_valid())
       return false;
-    file_util::ScopedFD scoped_fd(&fd);
-    if (CallFstat(fd, &file_info) != 0)
+    if (CallFstat(fd.get(), &file_info) != 0)
       return false;
   } else {
 #endif  // defined(OS_ANDROID)
diff --git a/base/file_util_unittest.cc b/base/file_util_unittest.cc
index 96b58582..8ee55ff 100644
--- a/base/file_util_unittest.cc
+++ b/base/file_util_unittest.cc
@@ -26,6 +26,7 @@
 #include "base/file_util.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
+#include "base/files/scoped_file.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/path_service.h"
 #include "base/strings/utf_string_conversions.h"
@@ -2473,9 +2474,9 @@ TEST(ScopedFD, ScopedFDDoesClose) {
   char c = 0;
   ASSERT_EQ(0, pipe(fds));
   const int write_end = fds[1];
-  file_util::ScopedFDCloser read_end_closer(fds);
+  base::ScopedFD read_end_closer(fds[0]);
   {
-    file_util::ScopedFDCloser write_end_closer(fds + 1);
+    base::ScopedFD write_end_closer(fds[1]);
   }
   // This is the only thread. This file descriptor should no longer be valid.
   int ret = close(write_end);
@@ -2489,14 +2490,14 @@ TEST(ScopedFD, ScopedFDDoesClose) {
 
 #if defined(GTEST_HAS_DEATH_TEST)
 void CloseWithScopedFD(int fd) {
-  file_util::ScopedFDCloser fd_closer(&fd);
+  base::ScopedFD fd_closer(fd);
 }
 #endif
 
 TEST(ScopedFD, ScopedFDCrashesOnCloseFailure) {
   int fds[2];
   ASSERT_EQ(0, pipe(fds));
-  file_util::ScopedFDCloser read_end_closer(fds);
+  base::ScopedFD read_end_closer(fds[0]);
   EXPECT_EQ(0, IGNORE_EINTR(close(fds[1])));
 #if defined(GTEST_HAS_DEATH_TEST)
   // This is the only thread. This file descriptor should no longer be valid.
diff --git a/base/files/scoped_file.cc b/base/files/scoped_file.cc
new file mode 100644
index 0000000..39f064d
--- /dev/null
+++ b/base/files/scoped_file.cc
@@ -0,0 +1,35 @@
+// Copyright 2014 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/files/scoped_file.h"
+
+#include "base/logging.h"
+
+#if defined(OS_POSIX)
+#include <unistd.h>
+
+#include "base/posix/eintr_wrapper.h"
+#endif
+
+namespace base {
+namespace internal {
+
+#if defined(OS_POSIX)
+
+// static
+void ScopedFDCloseTraits::Free(int fd) {
+  // It's important to crash here.
+  // There are security implications to not closing a file descriptor
+  // properly. As file descriptors are "capabilities", keeping them open
+  // would make the current process keep access to a resource. Much of
+  // Chrome relies on being able to "drop" such access.
+  // It's especially problematic on Linux with the setuid sandbox, where
+  // a single open directory would bypass the entire security model.
+  PCHECK(0 == IGNORE_EINTR(close(fd)));
+}
+
+#endif  // OS_POSIX
+
+}  // namespace internal
+}  // namespace base
diff --git a/base/files/scoped_file.h b/base/files/scoped_file.h
new file mode 100644
index 0000000..f5d7ecde
--- /dev/null
+++ b/base/files/scoped_file.h
@@ -0,0 +1,47 @@
+// Copyright 2014 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.
+
+#ifndef BASE_FILES_SCOPED_FILE_H_
+#define BASE_FILES_SCOPED_FILE_H_
+
+#include <stdio.h>
+
+#include "base/base_export.h"
+#include "base/logging.h"
+#include "base/scoped_generic.h"
+#include "build/build_config.h"
+
+namespace base {
+
+namespace internal {
+
+#if defined(OS_POSIX)
+struct BASE_EXPORT ScopedFDCloseTraits {
+  static int InvalidValue() {
+    return -1;
+  }
+  static void Free(int fd);
+};
+#endif
+
+}  // namespace internal
+
+#if defined(OS_POSIX)
+// A low-level Posix file descriptor closer class. Use this when writing
+// platform-specific code, especially that does non-file-like things with the
+// FD (like sockets).
+//
+// If you're writing low-level Windows code, see base/win/scoped_handle.h
+// which provides some additional functionality.
+//
+// If you're writing cross-platform code that deals with actual files, you
+// should generally use base::File instead which can be constructed with a
+// handle, and in addition to handling ownership, has convenient cross-platform
+// file manipulation functions on it.
+typedef ScopedGeneric<int, internal::ScopedFDCloseTraits> ScopedFD;
+#endif
+
+}  // namespace base
+
+#endif  // BASE_FILES_SCOPED_FILE_H_
diff --git a/base/memory/discardable_memory_allocator_android.cc b/base/memory/discardable_memory_allocator_android.cc
index 97e9abd..1588317 100644
--- a/base/memory/discardable_memory_allocator_android.cc
+++ b/base/memory/discardable_memory_allocator_android.cc
@@ -16,6 +16,7 @@
 #include "base/basictypes.h"
 #include "base/containers/hash_tables.h"
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/memory/discardable_memory.h"
 #include "base/memory/scoped_vector.h"
@@ -65,14 +66,13 @@ bool CreateAshmemRegion(const char* name,
                         size_t size,
                         int* out_fd,
                         void** out_address) {
-  int fd = ashmem_create_region(name, size);
-  if (fd < 0) {
+  base::ScopedFD fd(ashmem_create_region(name, size));
+  if (!fd.is_valid()) {
     DLOG(ERROR) << "ashmem_create_region() failed";
     return false;
   }
-  file_util::ScopedFD fd_closer(&fd);
 
-  const int err = ashmem_set_prot_region(fd, PROT_READ | PROT_WRITE);
+  const int err = ashmem_set_prot_region(fd.get(), PROT_READ | PROT_WRITE);
   if (err < 0) {
     DLOG(ERROR) << "Error " << err << " when setting protection of ashmem";
     return false;
@@ -82,14 +82,13 @@ bool CreateAshmemRegion(const char* name,
   // Lock() and Unlock(), data could get lost if they are not written to the
   // underlying file when Unlock() gets called.
   void* const address = mmap(
-      NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+      NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd.get(), 0);
   if (address == MAP_FAILED) {
     DPLOG(ERROR) << "Failed to map memory.";
     return false;
   }
 
-  ignore_result(fd_closer.release());
-  *out_fd = fd;
+  *out_fd = fd.release();
   *out_address = address;
   return true;
 }
diff --git a/base/memory/shared_memory.h b/base/memory/shared_memory.h
index 50b61c4..8e32e72 100644
--- a/base/memory/shared_memory.h
+++ b/base/memory/shared_memory.h
@@ -22,6 +22,7 @@
 #if defined(OS_POSIX)
 #include "base/file_descriptor_posix.h"
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #endif
 
 namespace base {
@@ -259,7 +260,7 @@ class BASE_EXPORT SharedMemory {
 
  private:
 #if defined(OS_POSIX) && !defined(OS_NACL)
-  bool PrepareMapFile(file_util::ScopedFILE fp, file_util::ScopedFD readonly);
+  bool PrepareMapFile(file_util::ScopedFILE fp, base::ScopedFD readonly);
   bool FilePathForMemoryName(const std::string& mem_name, FilePath* path);
   void LockOrUnlockCommon(int function);
 #endif
diff --git a/base/memory/shared_memory_posix.cc b/base/memory/shared_memory_posix.cc
index 8780c04..1a90847 100644
--- a/base/memory/shared_memory_posix.cc
+++ b/base/memory/shared_memory_posix.cc
@@ -30,7 +30,6 @@
 #include "third_party/ashmem/ashmem.h"
 #endif
 
-using file_util::ScopedFD;
 using file_util::ScopedFILE;
 
 namespace base {
@@ -132,8 +131,7 @@ bool SharedMemory::Create(const SharedMemoryCreateOptions& options) {
 
   ScopedFILE fp;
   bool fix_size = true;
-  int readonly_fd_storage = -1;
-  ScopedFD readonly_fd(&readonly_fd_storage);
+  ScopedFD readonly_fd;
 
   FilePath path;
   if (options.name_deprecated == NULL || options.name_deprecated->empty()) {
@@ -145,8 +143,8 @@ bool SharedMemory::Create(const SharedMemoryCreateOptions& options) {
 
     if (fp) {
       // Also open as readonly so that we can ShareReadOnlyToProcess.
-      *readonly_fd = HANDLE_EINTR(open(path.value().c_str(), O_RDONLY));
-      if (*readonly_fd < 0) {
+      readonly_fd.reset(HANDLE_EINTR(open(path.value().c_str(), O_RDONLY)));
+      if (!readonly_fd.is_valid()) {
         DPLOG(ERROR) << "open(\"" << path.value() << "\", O_RDONLY) failed";
         fp.reset();
       }
@@ -198,8 +196,8 @@ bool SharedMemory::Create(const SharedMemoryCreateOptions& options) {
     }
 
     // Also open as readonly so that we can ShareReadOnlyToProcess.
-    *readonly_fd = HANDLE_EINTR(open(path.value().c_str(), O_RDONLY));
-    if (*readonly_fd < 0) {
+    readonly_fd.reset(HANDLE_EINTR(open(path.value().c_str(), O_RDONLY)));
+    if (!readonly_fd.is_valid()) {
       DPLOG(ERROR) << "open(\"" << path.value() << "\", O_RDONLY) failed";
       close(fd);
       fd = -1;
@@ -265,10 +263,8 @@ bool SharedMemory::Open(const std::string& name, bool read_only) {
 
   const char *mode = read_only ? "r" : "r+";
   ScopedFILE fp(base::OpenFile(path, mode));
-  int readonly_fd_storage = -1;
-  ScopedFD readonly_fd(&readonly_fd_storage);
-  *readonly_fd = HANDLE_EINTR(open(path.value().c_str(), O_RDONLY));
-  if (*readonly_fd < 0) {
+  ScopedFD readonly_fd(HANDLE_EINTR(open(path.value().c_str(), O_RDONLY)));
+  if (!readonly_fd.is_valid()) {
     DPLOG(ERROR) << "open(\"" << path.value() << "\", O_RDONLY) failed";
   }
   return PrepareMapFile(fp.Pass(), readonly_fd.Pass());
@@ -353,7 +349,7 @@ void SharedMemory::UnlockDeprecated() {
 bool SharedMemory::PrepareMapFile(ScopedFILE fp, ScopedFD readonly_fd) {
   DCHECK_EQ(-1, mapped_file_);
   DCHECK_EQ(-1, readonly_mapped_file_);
-  if (fp == NULL || *readonly_fd < 0) return false;
+  if (fp == NULL || !readonly_fd.is_valid()) return false;
 
   // This function theoretically can block on the disk, but realistically
   // the temporary files we create will just go into the buffer cache
@@ -364,7 +360,7 @@ bool SharedMemory::PrepareMapFile(ScopedFILE fp, ScopedFD readonly_fd) {
   struct stat readonly_st = {};
   if (fstat(fileno(fp.get()), &st))
     NOTREACHED();
-  if (fstat(*readonly_fd, &readonly_st))
+  if (fstat(readonly_fd.get(), &readonly_st))
     NOTREACHED();
   if (st.st_dev != readonly_st.st_dev || st.st_ino != readonly_st.st_ino) {
     LOG(ERROR) << "writable and read-only inodes don't match; bailing";
@@ -381,7 +377,7 @@ bool SharedMemory::PrepareMapFile(ScopedFILE fp, ScopedFD readonly_fd) {
     }
   }
   inode_ = st.st_ino;
-  readonly_mapped_file_ = *readonly_fd.release();
+  readonly_mapped_file_ = readonly_fd.release();
 
   return true;
 }
diff --git a/base/posix/unix_domain_socket_linux_unittest.cc b/base/posix/unix_domain_socket_linux_unittest.cc
index 22bb172..bb7154f 100644
--- a/base/posix/unix_domain_socket_linux_unittest.cc
+++ b/base/posix/unix_domain_socket_linux_unittest.cc
@@ -9,6 +9,7 @@
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/pickle.h"
 #include "base/posix/unix_domain_socket_linux.h"
 #include "base/synchronization/waitable_event.h"
@@ -25,8 +26,8 @@ TEST(UnixDomainSocketTest, SendRecvMsgAbortOnReplyFDClose) {
 
   int fds[2];
   ASSERT_EQ(0, socketpair(AF_UNIX, SOCK_SEQPACKET, 0, fds));
-  file_util::ScopedFD scoped_fd0(&fds[0]);
-  file_util::ScopedFD scoped_fd1(&fds[1]);
+  ScopedFD scoped_fd0(fds[0]);
+  ScopedFD scoped_fd1(fds[1]);
 
   // Have the thread send a synchronous message via the socket.
   Pickle request;
@@ -62,7 +63,7 @@ TEST(UnixDomainSocketTest, SendRecvMsgAvoidsSIGPIPE) {
   ASSERT_EQ(0, sigaction(SIGPIPE, &act, &oldact));
   int fds[2];
   ASSERT_EQ(0, socketpair(AF_UNIX, SOCK_SEQPACKET, 0, fds));
-  file_util::ScopedFD scoped_fd1(&fds[1]);
+  ScopedFD scoped_fd1(fds[1]);
   ASSERT_EQ(0, IGNORE_EINTR(close(fds[0])));
 
   // Have the thread send a synchronous message via the socket. Unless the
diff --git a/base/process/kill_mac.cc b/base/process/kill_mac.cc
index 5ebca5d..1589a64 100644
--- a/base/process/kill_mac.cc
+++ b/base/process/kill_mac.cc
@@ -10,6 +10,7 @@
 #include <sys/wait.h>
 
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/posix/eintr_wrapper.h"
 
@@ -76,15 +77,13 @@ void WaitForChildToDie(pid_t child, int timeout) {
 
   int result;
 
-  int kq = HANDLE_EINTR(kqueue());
-  if (kq == -1) {
+  ScopedFD kq(HANDLE_EINTR(kqueue()));
+  if (!kq.is_valid()) {
     DPLOG(ERROR) << "kqueue()";
   } else {
-    file_util::ScopedFD auto_close_kq(&kq);
-
     struct kevent change = {0};
     EV_SET(&change, child, EVFILT_PROC, EV_ADD, NOTE_EXIT, 0, NULL);
-    result = HANDLE_EINTR(kevent(kq, &change, 1, NULL, 0, NULL));
+    result = HANDLE_EINTR(kevent(kq.get(), &change, 1, NULL, 0, NULL));
 
     if (result == -1) {
       if (errno != ESRCH) {
@@ -120,7 +119,7 @@ void WaitForChildToDie(pid_t child, int timeout) {
       struct kevent event = {0};
       while (remaining_delta.InMilliseconds() > 0) {
         const struct timespec remaining_timespec = remaining_delta.ToTimeSpec();
-        result = kevent(kq, NULL, 0, &event, 1, &remaining_timespec);
+        result = kevent(kq.get(), NULL, 0, &event, 1, &remaining_timespec);
         if (result == -1 && errno == EINTR) {
           remaining_delta = deadline - TimeTicks::Now();
           result = 0;
diff --git a/base/process/kill_posix.cc b/base/process/kill_posix.cc
index 99d70d9..8187c38 100644
--- a/base/process/kill_posix.cc
+++ b/base/process/kill_posix.cc
@@ -10,6 +10,7 @@
 #include <unistd.h>
 
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/posix/eintr_wrapper.h"
 #include "base/process/process_iterator.h"
@@ -273,16 +274,15 @@ static bool WaitForSingleNonChildProcess(ProcessHandle handle,
   DCHECK_GT(handle, 0);
   DCHECK(wait.InMilliseconds() == base::kNoTimeout || wait > base::TimeDelta());
 
-  int kq = kqueue();
-  if (kq == -1) {
+  ScopedFD kq(kqueue());
+  if (!kq.is_valid()) {
     DPLOG(ERROR) << "kqueue";
     return false;
   }
-  file_util::ScopedFD kq_closer(&kq);
 
   struct kevent change = {0};
   EV_SET(&change, handle, EVFILT_PROC, EV_ADD, NOTE_EXIT, 0, NULL);
-  int result = HANDLE_EINTR(kevent(kq, &change, 1, NULL, 0, NULL));
+  int result = HANDLE_EINTR(kevent(kq.get(), &change, 1, NULL, 0, NULL));
   if (result == -1) {
     if (errno == ESRCH) {
       // If the process wasn't found, it must be dead.
@@ -316,7 +316,7 @@ static bool WaitForSingleNonChildProcess(ProcessHandle handle,
       remaining_timespec_ptr = &remaining_timespec;
     }
 
-    result = kevent(kq, NULL, 0, &event, 1, remaining_timespec_ptr);
+    result = kevent(kq.get(), NULL, 0, &event, 1, remaining_timespec_ptr);
 
     if (result == -1 && errno == EINTR) {
       if (!wait_forever) {
diff --git a/base/process/launch_posix.cc b/base/process/launch_posix.cc
index 84a05d6..79e74d5 100644
--- a/base/process/launch_posix.cc
+++ b/base/process/launch_posix.cc
@@ -26,6 +26,7 @@
 #include "base/debug/stack_trace.h"
 #include "base/file_util.h"
 #include "base/files/dir_reader_posix.h"
+#include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/posix/eintr_wrapper.h"
@@ -332,14 +333,13 @@ bool LaunchProcess(const std::vector<std::string>& argv,
     // If a child process uses the readline library, the process block forever.
     // In BSD like OSes including OS X it is safe to assign /dev/null as stdin.
     // See http://crbug.com/56596.
-    int null_fd = HANDLE_EINTR(open("/dev/null", O_RDONLY));
-    if (null_fd < 0) {
+    base::ScopedFD null_fd(HANDLE_EINTR(open("/dev/null", O_RDONLY)));
+    if (!null_fd.is_valid()) {
       RAW_LOG(ERROR, "Failed to open /dev/null");
       _exit(127);
     }
 
-    file_util::ScopedFD null_fd_closer(&null_fd);
-    int new_fd = HANDLE_EINTR(dup2(null_fd, STDIN_FILENO));
+    int new_fd = HANDLE_EINTR(dup2(null_fd.get(), STDIN_FILENO));
     if (new_fd != STDIN_FILENO) {
       RAW_LOG(ERROR, "Failed to dup /dev/null for stdin");
       _exit(127);
diff --git a/base/test/launcher/test_launcher.cc b/base/test/launcher/test_launcher.cc
index c25b00a..889244d 100644
--- a/base/test/launcher/test_launcher.cc
+++ b/base/test/launcher/test_launcher.cc
@@ -14,6 +14,7 @@
 #include "base/environment.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
+#include "base/files/scoped_file.h"
 #include "base/format_macros.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
@@ -244,16 +245,14 @@ void DoLaunchChildTestProcess(
   options.new_process_group = true;
 
   base::FileHandleMappingVector fds_mapping;
-  file_util::ScopedFD output_file_fd_closer;
+  base::ScopedFD output_file_fd;
 
   if (redirect_stdio) {
-    int output_file_fd = open(output_file.value().c_str(), O_RDWR);
-    CHECK_GE(output_file_fd, 0);
+    output_file_fd.reset(open(output_file.value().c_str(), O_RDWR));
+    CHECK(output_file_fd.is_valid());
 
-    output_file_fd_closer.reset(&output_file_fd);
-
-    fds_mapping.push_back(std::make_pair(output_file_fd, STDOUT_FILENO));
-    fds_mapping.push_back(std::make_pair(output_file_fd, STDERR_FILENO));
+    fds_mapping.push_back(std::make_pair(output_file_fd.get(), STDOUT_FILENO));
+    fds_mapping.push_back(std::make_pair(output_file_fd.get(), STDERR_FILENO));
     options.fds_to_remap = &fds_mapping;
   }
 #endif
@@ -264,10 +263,10 @@ void DoLaunchChildTestProcess(
 
   if (redirect_stdio) {
 #if defined(OS_WIN)
-  FlushFileBuffers(handle.Get());
-  handle.Close();
+    FlushFileBuffers(handle.Get());
+    handle.Close();
 #elif defined(OS_POSIX)
-  output_file_fd_closer.reset();
+    output_file_fd.reset();
 #endif
   }
 
diff --git a/chrome/browser/chromeos/system/automatic_reboot_manager.cc b/chrome/browser/chromeos/system/automatic_reboot_manager.cc
index 1e00316..2ca1409 100644
--- a/chrome/browser/chromeos/system/automatic_reboot_manager.cc
+++ b/chrome/browser/chromeos/system/automatic_reboot_manager.cc
@@ -18,6 +18,7 @@
 #include "base/callback.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
+#include "base/files/scoped_file.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
@@ -56,15 +57,15 @@ const int kOneKilobyte = 1 << 10;                  // 1 kB in bytes.
 
 base::TimeDelta ReadTimeDeltaFromFile(const base::FilePath& path) {
   base::ThreadRestrictions::AssertIOAllowed();
-  int fd = HANDLE_EINTR(open(path.value().c_str(), O_RDONLY | O_NOFOLLOW));
-  if (fd < 0)
+  base::ScopedFD fd(
+      HANDLE_EINTR(open(path.value().c_str(), O_RDONLY | O_NOFOLLOW)));
+  if (!fd.is_valid())
     return base::TimeDelta();
-  file_util::ScopedFD fd_closer(&fd);
 
   std::string contents;
   char buffer[kOneKilobyte];
   ssize_t length;
-  while ((length = read(fd, buffer, sizeof(buffer))) > 0)
+  while ((length = read(fd.get(), buffer, sizeof(buffer))) > 0)
     contents.append(buffer, length);
 
   double seconds;
@@ -108,16 +109,16 @@ void SaveUpdateRebootNeededUptime() {
   if (uptime == kZeroTimeDelta)
     return;
 
-  int fd = HANDLE_EINTR(open(update_reboot_needed_uptime_file.value().c_str(),
-                             O_CREAT | O_WRONLY | O_TRUNC | O_NOFOLLOW,
-                             0666));
-  if (fd < 0)
+  base::ScopedFD fd(HANDLE_EINTR(
+      open(update_reboot_needed_uptime_file.value().c_str(),
+           O_CREAT | O_WRONLY | O_TRUNC | O_NOFOLLOW,
+           0666)));
+  if (!fd.is_valid())
     return;
-  file_util::ScopedFD fd_closer(&fd);
 
   std::string update_reboot_needed_uptime =
       base::DoubleToString(uptime.InSecondsF());
-  base::WriteFileDescriptor(fd, update_reboot_needed_uptime.c_str(),
+  base::WriteFileDescriptor(fd.get(), update_reboot_needed_uptime.c_str(),
                             update_reboot_needed_uptime.size());
 }
 
diff --git a/chrome/browser/extensions/api/messaging/native_message_process_host_unittest.cc b/chrome/browser/extensions/api/messaging/native_message_process_host_unittest.cc
index a57fb74..cf5b80b 100644
--- a/chrome/browser/extensions/api/messaging/native_message_process_host_unittest.cc
+++ b/chrome/browser/extensions/api/messaging/native_message_process_host_unittest.cc
@@ -5,6 +5,7 @@
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
+#include "base/files/scoped_file.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/json/json_reader.h"
 #include "base/memory/scoped_ptr.h"
@@ -214,8 +215,8 @@ TEST_F(NativeMessagingTest, SingleSendMessageWrite) {
 #else  // defined(OS_WIN)
   base::PlatformFile pipe_handles[2];
   ASSERT_EQ(0, pipe(pipe_handles));
-  file_util::ScopedFD read_fd(pipe_handles);
-  file_util::ScopedFD write_fd(pipe_handles + 1);
+  base::ScopedFD read_fd(pipe_handles[0]);
+  base::ScopedFD write_fd(pipe_handles[1]);
 
   read_file = pipe_handles[0];
 #endif  // !defined(OS_WIN)
diff --git a/chrome/browser/extensions/api/messaging/native_process_launcher_posix.cc b/chrome/browser/extensions/api/messaging/native_process_launcher_posix.cc
index f4523fc..70353d3 100644
--- a/chrome/browser/extensions/api/messaging/native_process_launcher_posix.cc
+++ b/chrome/browser/extensions/api/messaging/native_process_launcher_posix.cc
@@ -6,6 +6,7 @@
 
 #include "base/command_line.h"
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/posix/eintr_wrapper.h"
@@ -58,18 +59,18 @@ bool NativeProcessLauncher::LaunchNativeProcess(
     LOG(ERROR) << "Bad read pipe";
     return false;
   }
-  file_util::ScopedFD read_pipe_read_fd(&read_pipe_fds[0]);
-  file_util::ScopedFD read_pipe_write_fd(&read_pipe_fds[1]);
-  fd_map.push_back(std::make_pair(*read_pipe_write_fd, STDOUT_FILENO));
+  base::ScopedFD read_pipe_read_fd(read_pipe_fds[0]);
+  base::ScopedFD read_pipe_write_fd(read_pipe_fds[1]);
+  fd_map.push_back(std::make_pair(read_pipe_write_fd.get(), STDOUT_FILENO));
 
   int write_pipe_fds[2] = {0};
   if (HANDLE_EINTR(pipe(write_pipe_fds)) != 0) {
     LOG(ERROR) << "Bad write pipe";
     return false;
   }
-  file_util::ScopedFD write_pipe_read_fd(&write_pipe_fds[0]);
-  file_util::ScopedFD write_pipe_write_fd(&write_pipe_fds[1]);
-  fd_map.push_back(std::make_pair(*write_pipe_read_fd, STDIN_FILENO));
+  base::ScopedFD write_pipe_read_fd(write_pipe_fds[0]);
+  base::ScopedFD write_pipe_write_fd(write_pipe_fds[1]);
+  fd_map.push_back(std::make_pair(write_pipe_read_fd.get(), STDIN_FILENO));
 
   base::LaunchOptions options;
   options.fds_to_remap = &fd_map;
@@ -82,8 +83,8 @@ bool NativeProcessLauncher::LaunchNativeProcess(
   write_pipe_read_fd.reset();
   read_pipe_write_fd.reset();
 
-  *read_file = *read_pipe_read_fd.release();
-  *write_file = *write_pipe_write_fd.release();
+  *read_file = read_pipe_read_fd.release();
+  *write_file = write_pipe_write_fd.release();
 
   return true;
 }
diff --git a/chrome/browser/mac/relauncher.cc b/chrome/browser/mac/relauncher.cc
index 5d8357f..e659793 100644
--- a/chrome/browser/mac/relauncher.cc
+++ b/chrome/browser/mac/relauncher.cc
@@ -19,6 +19,7 @@
 
 #include "base/basictypes.h"
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/mac/mac_logging.h"
 #include "base/mac/mac_util.h"
@@ -132,8 +133,8 @@ bool RelaunchAppWithHelper(const std::string& helper,
   // write side of the pipe. In that process, the read side will be closed by
   // base::LaunchApp because it won't be present in fd_map, and the write side
   // will be remapped to kRelauncherSyncFD by fd_map.
-  file_util::ScopedFD pipe_read_fd(&pipe_fds[0]);
-  file_util::ScopedFD pipe_write_fd(&pipe_fds[1]);
+  base::ScopedFD pipe_read_fd(pipe_fds[0]);
+  base::ScopedFD pipe_write_fd(pipe_fds[1]);
 
   // Make sure kRelauncherSyncFD is a safe value. base::LaunchProcess will
   // preserve these three FDs in forked processes, so kRelauncherSyncFD should
@@ -144,7 +145,7 @@ bool RelaunchAppWithHelper(const std::string& helper,
                  kRelauncherSyncFD_must_not_conflict_with_stdio_fds);
 
   base::FileHandleMappingVector fd_map;
-  fd_map.push_back(std::make_pair(*pipe_write_fd, kRelauncherSyncFD));
+  fd_map.push_back(std::make_pair(pipe_write_fd.get(), kRelauncherSyncFD));
 
   base::LaunchOptions options;
   options.fds_to_remap = &fd_map;
@@ -160,7 +161,7 @@ bool RelaunchAppWithHelper(const std::string& helper,
 
   // Synchronize with the relauncher process.
   char read_char;
-  int read_result = HANDLE_EINTR(read(*pipe_read_fd, &read_char, 1));
+  int read_result = HANDLE_EINTR(read(pipe_read_fd.get(), &read_char, 1));
   if (read_result != 1) {
     if (read_result < 0) {
       PLOG(ERROR) << "read";
@@ -185,9 +186,7 @@ namespace {
 // situations, it can be assumed that something went wrong with the parent
 // process and the best recovery approach is to attempt relaunch anyway.
 void RelauncherSynchronizeWithParent() {
-  // file_util::ScopedFD needs something non-const to operate on.
-  int relauncher_sync_fd = kRelauncherSyncFD;
-  file_util::ScopedFD relauncher_sync_fd_closer(&relauncher_sync_fd);
+  base::ScopedFD relauncher_sync_fd(kRelauncherSyncFD);
 
   int parent_pid = getppid();
 
@@ -201,22 +200,21 @@ void RelauncherSynchronizeWithParent() {
   }
 
   // Set up a kqueue to monitor the parent process for exit.
-  int kq = kqueue();
-  if (kq < 0) {
+  base::ScopedFD kq(kqueue());
+  if (!kq.is_valid()) {
     PLOG(ERROR) << "kqueue";
     return;
   }
-  file_util::ScopedFD kq_closer(&kq);
 
   struct kevent change = { 0 };
   EV_SET(&change, parent_pid, EVFILT_PROC, EV_ADD, NOTE_EXIT, 0, NULL);
-  if (kevent(kq, &change, 1, NULL, 0, NULL) == -1) {
+  if (kevent(kq.get(), &change, 1, NULL, 0, NULL) == -1) {
     PLOG(ERROR) << "kevent (add)";
     return;
   }
 
   // Write a '\0' character to the pipe.
-  if (HANDLE_EINTR(write(relauncher_sync_fd, "", 1)) != 1) {
+  if (HANDLE_EINTR(write(relauncher_sync_fd.get(), "", 1)) != 1) {
     PLOG(ERROR) << "write";
     return;
   }
@@ -225,7 +223,7 @@ void RelauncherSynchronizeWithParent() {
   // write above to complete. The parent process is now free to exit. Wait for
   // that to happen.
   struct kevent event;
-  int events = kevent(kq, NULL, 0, &event, 1, NULL);
+  int events = kevent(kq.get(), NULL, 0, &event, 1, NULL);
   if (events != 1) {
     if (events < 0) {
       PLOG(ERROR) << "kevent (monitor)";
diff --git a/chrome/browser/process_singleton_mac_unittest.cc b/chrome/browser/process_singleton_mac_unittest.cc
index 4246c27..b6a5b7b 100644
--- a/chrome/browser/process_singleton_mac_unittest.cc
+++ b/chrome/browser/process_singleton_mac_unittest.cc
@@ -9,6 +9,7 @@
 #include "chrome/browser/process_singleton.h"
 
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/path_service.h"
 #include "base/posix/eintr_wrapper.h"
 #include "chrome/common/chrome_constants.h"
@@ -39,15 +40,13 @@ class ProcessSingletonMacTest : public PlatformTest {
   // Return |true| if the file exists and is locked.  Forces a failure
   // in the containing test in case of error condition.
   bool IsLocked() {
-    int fd = HANDLE_EINTR(open(lock_path_.value().c_str(), O_RDONLY));
-    if (fd == -1) {
+    base::ScopedFD fd(HANDLE_EINTR(open(lock_path_.value().c_str(), O_RDONLY)));
+    if (!fd.is_valid()) {
       EXPECT_EQ(ENOENT, errno) << "Unexpected error opening lockfile.";
       return false;
     }
 
-    file_util::ScopedFD auto_close(&fd);
-
-    int rc = HANDLE_EINTR(flock(fd, LOCK_EX|LOCK_NB));
+    int rc = HANDLE_EINTR(flock(fd.get(), LOCK_EX|LOCK_NB));
 
     // Got the lock, so it wasn't already locked.  Close releases.
     if (rc != -1)
diff --git a/chrome/test/automation/proxy_launcher.cc b/chrome/test/automation/proxy_launcher.cc
index 6171f28..e49c4d6 100644
--- a/chrome/test/automation/proxy_launcher.cc
+++ b/chrome/test/automation/proxy_launcher.cc
@@ -9,6 +9,7 @@
 #include "base/environment.h"
 #include "base/file_util.h"
 #include "base/files/file_enumerator.h"
+#include "base/files/scoped_file.h"
 #include "base/process/kill.h"
 #include "base/process/launch.h"
 #include "base/strings/string_number_conversions.h"
@@ -489,12 +490,11 @@ bool ProxyLauncher::LaunchBrowserHelper(const LaunchState& state,
 #if defined(OS_WIN)
   options.start_hidden = !state.show_window;
 #elif defined(OS_POSIX)
-  int ipcfd = -1;
-  file_util::ScopedFD ipcfd_closer(&ipcfd);
+  base::ScopedFD ipcfd;
   base::FileHandleMappingVector fds;
   if (main_launch && automation_proxy_.get()) {
-    ipcfd = automation_proxy_->channel()->TakeClientFileDescriptor();
-    fds.push_back(std::make_pair(ipcfd,
+    ipcfd.reset(automation_proxy_->channel()->TakeClientFileDescriptor());
+    fds.push_back(std::make_pair(ipcfd.get(),
         kPrimaryIPCChannel + base::GlobalDescriptors::kBaseDescriptor));
     options.fds_to_remap = &fds;
   }
diff --git a/chrome/test/chromedriver/chrome_launcher.cc b/chrome/test/chromedriver/chrome_launcher.cc
index 44a4ad8..1ca47c3 100644
--- a/chrome/test/chromedriver/chrome_launcher.cc
+++ b/chrome/test/chromedriver/chrome_launcher.cc
@@ -12,6 +12,7 @@
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
+#include "base/files/scoped_file.h"
 #include "base/format_macros.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
@@ -250,15 +251,14 @@ Status LaunchDesktopChrome(
 
 #if defined(OS_POSIX)
   base::FileHandleMappingVector no_stderr;
-  int devnull = -1;
-  file_util::ScopedFD scoped_devnull(&devnull);
+  base::ScopedFD devnull;
   if (!CommandLine::ForCurrentProcess()->HasSwitch("verbose")) {
     // Redirect stderr to /dev/null, so that Chrome log spew doesn't confuse
     // users.
-    devnull = open("/dev/null", O_WRONLY);
-    if (devnull == -1)
+    devnull.reset(open("/dev/null", O_WRONLY));
+    if (!devnull.is_valid())
       return Status(kUnknownError, "couldn't open /dev/null");
-    no_stderr.push_back(std::make_pair(devnull, STDERR_FILENO));
+    no_stderr.push_back(std::make_pair(devnull.get(), STDERR_FILENO));
     options.fds_to_remap = &no_stderr;
   }
 #endif
diff --git a/chrome/utility/importer/firefox_importer_unittest_utils_mac.cc b/chrome/utility/importer/firefox_importer_unittest_utils_mac.cc
index 6b21149..93961c5 100644
--- a/chrome/utility/importer/firefox_importer_unittest_utils_mac.cc
+++ b/chrome/utility/importer/firefox_importer_unittest_utils_mac.cc
@@ -9,6 +9,7 @@
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
+#include "base/files/scoped_file.h"
 #include "base/message_loop/message_loop.h"
 #include "base/posix/global_descriptors.h"
 #include "base/process/kill.h"
@@ -47,13 +48,12 @@ bool LaunchNSSDecrypterChildProcess(const base::FilePath& nss_path,
   base::LaunchOptions options;
   options.environ["DYLD_FALLBACK_LIBRARY_PATH"] = nss_path.value();
 
-  int ipcfd = channel->TakeClientFileDescriptor();
-  if (ipcfd == -1)
+  base::ScopedFD ipcfd(channel->TakeClientFileDescriptor());
+  if (!ipcfd.is_valid())
     return false;
 
-  file_util::ScopedFD client_file_descriptor_closer(&ipcfd);
   base::FileHandleMappingVector fds_to_map;
-  fds_to_map.push_back(std::pair<int,int>(ipcfd,
+  fds_to_map.push_back(std::pair<int,int>(ipcfd.get(),
       kPrimaryIPCChannel + base::GlobalDescriptors::kBaseDescriptor));
 
   bool debug_on_start = CommandLine::ForCurrentProcess()->HasSwitch(
diff --git a/components/nacl.gyp b/components/nacl.gyp
index 990221e..d34c1ba 100644
--- a/components/nacl.gyp
+++ b/components/nacl.gyp
@@ -211,6 +211,7 @@
                 'nacl/loader/nonsfi/irt_util.h',
                 'nacl/loader/nonsfi/nonsfi_main.cc',
                 'nacl/loader/nonsfi/nonsfi_main.h',
+                '../base/files/scoped_file.cc',
                 '../base/posix/unix_domain_socket_linux.cc',
                 '../content/common/child_process_sandbox_support_impl_shm_linux.cc',
                 '../content/common/sandbox_linux/sandbox_bpf_base_policy_linux.cc',
diff --git a/content/browser/child_process_launcher.cc b/content/browser/child_process_launcher.cc
index cacf138..5d7b612 100644
--- a/content/browser/child_process_launcher.cc
+++ b/content/browser/child_process_launcher.cc
@@ -9,6 +9,7 @@
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
@@ -228,7 +229,7 @@ class ChildProcessLauncher::Context
     base::ProcessHandle handle = base::kNullProcessHandle;
     // We need to close the client end of the IPC channel to reliably detect
     // child termination.
-    file_util::ScopedFD ipcfd_closer(&ipcfd);
+    base::ScopedFD ipcfd_closer(ipcfd);
 
 #if !defined(OS_MACOSX)
     GetContentClient()->browser()->
@@ -319,7 +320,7 @@ class ChildProcessLauncher::Context
       base::ProcessHandle handle) {
 #if defined(OS_ANDROID)
     // Finally close the ipcfd
-    file_util::ScopedFD ipcfd_closer(&ipcfd_);
+    base::ScopedFD ipcfd_closer(ipcfd_);
 #endif
     starting_ = false;
     process_.set_handle(handle);
diff --git a/content/browser/zygote_host/zygote_host_impl_linux.cc b/content/browser/zygote_host/zygote_host_impl_linux.cc
index 18e9b69..aaf4d3b 100644
--- a/content/browser/zygote_host/zygote_host_impl_linux.cc
+++ b/content/browser/zygote_host/zygote_host_impl_linux.cc
@@ -14,6 +14,7 @@
 #include "base/environment.h"
 #include "base/file_util.h"
 #include "base/files/file_enumerator.h"
+#include "base/files/scoped_file.h"
 #include "base/linux_util.h"
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
@@ -318,7 +319,7 @@ pid_t ZygoteHostImpl::ForkRequest(
   std::vector<int> fds;
   // Scoped pointers cannot be stored in containers, so we have to use a
   // linked_ptr.
-  std::vector<linked_ptr<file_util::ScopedFD> > autodelete_fds;
+  std::vector<linked_ptr<base::ScopedFD> > autodelete_fds;
   for (std::vector<FileDescriptorInfo>::const_iterator
        i = mapping.begin(); i != mapping.end(); ++i) {
     pickle.WriteUInt32(i->id);
@@ -326,8 +327,7 @@ pid_t ZygoteHostImpl::ForkRequest(
     if (i->fd.auto_close) {
       // Auto-close means we need to close the FDs after they have been passed
       // to the other process.
-      linked_ptr<file_util::ScopedFD> ptr(
-          new file_util::ScopedFD(&(fds.back())));
+      linked_ptr<base::ScopedFD> ptr(new base::ScopedFD(fds.back()));
       autodelete_fds.push_back(ptr);
     }
   }
diff --git a/content/child/npapi/np_channel_base.cc b/content/child/npapi/np_channel_base.cc
index 85ade5a..76845bd 100644
--- a/content/child/npapi/np_channel_base.cc
+++ b/content/child/npapi/np_channel_base.cc
@@ -6,6 +6,7 @@
 
 #include "base/auto_reset.h"
 #include "base/containers/hash_tables.h"
+#include "base/files/scoped_file.h"
 #include "base/lazy_instance.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/threading/thread_local.h"
@@ -68,8 +69,8 @@ NPChannelBase* NPChannelBase::GetChannel(
   // On POSIX the channel_handle conveys an FD (socket) which is duped by the
   // kernel during the IPC message exchange (via the SCM_RIGHTS mechanism).
   // Ensure we do not leak this FD.
-  int fd = channel_handle.socket.auto_close ? channel_handle.socket.fd : -1;
-  file_util::ScopedFD auto_close_fd(&fd);
+  base::ScopedFD fd(channel_handle.socket.auto_close ?
+                    channel_handle.socket.fd : -1);
 #endif
 
   scoped_refptr<NPChannelBase> channel;
@@ -86,7 +87,7 @@ NPChannelBase* NPChannelBase::GetChannel(
   if (!channel->channel_valid()) {
     channel->channel_handle_ = channel_handle;
 #if defined(OS_POSIX)
-    ignore_result(auto_close_fd.release());
+    ignore_result(fd.release());
 #endif
     if (mode & IPC::Channel::MODE_SERVER_FLAG) {
       channel->channel_handle_.name =
diff --git a/content/common/sandbox_linux/sandbox_linux.cc b/content/common/sandbox_linux/sandbox_linux.cc
index 5fd89f7..6f60584 100644
--- a/content/common/sandbox_linux/sandbox_linux.cc
+++ b/content/common/sandbox_linux/sandbox_linux.cc
@@ -15,6 +15,7 @@
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
+#include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
@@ -43,10 +44,6 @@ struct FDCloser {
   }
 };
 
-// Don't use base::ScopedFD since it doesn't CHECK that the file descriptor was
-// closed.
-typedef scoped_ptr<int, FDCloser> SafeScopedFD;
-
 void LogSandboxStarted(const std::string& sandbox_name) {
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
   const std::string process_type =
@@ -203,25 +200,25 @@ int LinuxSandbox::GetStatus() {
 // of using the pid.
 bool LinuxSandbox::IsSingleThreaded() const {
   bool is_single_threaded = false;
-  int proc_self_task = OpenProcTaskFd(proc_fd_);
+  base::ScopedFD proc_self_task(OpenProcTaskFd(proc_fd_));
 
 // In Debug mode, it's mandatory to be able to count threads to catch bugs.
 #if !defined(NDEBUG)
   // Using CHECK here since we want to check all the cases where
   // !defined(NDEBUG)
   // gets built.
-  CHECK_LE(0, proc_self_task) << "Could not count threads, the sandbox was not "
-                              << "pre-initialized properly.";
+  CHECK(proc_self_task.is_valid())
+      << "Could not count threads, the sandbox was not "
+      << "pre-initialized properly.";
 #endif  // !defined(NDEBUG)
 
-  if (proc_self_task < 0) {
+  if (!proc_self_task.is_valid()) {
     // Pretend to be monothreaded if it can't be determined (for instance the
     // setuid sandbox is already engaged but no proc_fd_ is available).
     is_single_threaded = true;
   } else {
-    SafeScopedFD task_closer(&proc_self_task);
     is_single_threaded =
-        sandbox::ThreadHelpers::IsSingleThreaded(proc_self_task);
+        sandbox::ThreadHelpers::IsSingleThreaded(proc_self_task.get());
   }
 
   return is_single_threaded;
@@ -391,11 +388,10 @@ void LinuxSandbox::CheckForBrokenPromises(const std::string& process_type) {
 
 void LinuxSandbox::StopThreadAndEnsureNotCounted(base::Thread* thread) const {
   DCHECK(thread);
-  int proc_self_task = OpenProcTaskFd(proc_fd_);
-  PCHECK(proc_self_task >= 0);
-  SafeScopedFD task_closer(&proc_self_task);
-  CHECK(
-      sandbox::ThreadHelpers::StopThreadAndWatchProcFS(proc_self_task, thread));
+  base::ScopedFD proc_self_task(OpenProcTaskFd(proc_fd_));
+  PCHECK(proc_self_task.is_valid());
+  CHECK(sandbox::ThreadHelpers::StopThreadAndWatchProcFS(proc_self_task.get(),
+                                                         thread));
 }
 
 }  // namespace content
diff --git a/content/common/sandbox_mac.mm b/content/common/sandbox_mac.mm
index 1ec3795..94c3c3d 100644
--- a/content/common/sandbox_mac.mm
+++ b/content/common/sandbox_mac.mm
@@ -17,6 +17,7 @@ extern "C" {
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/mac/bundle_locations.h"
 #include "base/mac/mac_util.h"
 #include "base/mac/scoped_cftyperef.h"
@@ -607,16 +608,15 @@ bool Sandbox::SandboxIsCurrentlyActive() {
 
 // static
 base::FilePath Sandbox::GetCanonicalSandboxPath(const base::FilePath& path) {
-  int fd = HANDLE_EINTR(open(path.value().c_str(), O_RDONLY));
-  if (fd < 0) {
+  base::ScopedFD fd(HANDLE_EINTR(open(path.value().c_str(), O_RDONLY)));
+  if (!fd.is_valid()) {
     DPLOG(FATAL) << "GetCanonicalSandboxPath() failed for: "
                  << path.value();
     return path;
   }
-  file_util::ScopedFD file_closer(&fd);
 
   base::FilePath::CharType canonical_path[MAXPATHLEN];
-  if (HANDLE_EINTR(fcntl(fd, F_GETPATH, canonical_path)) != 0) {
+  if (HANDLE_EINTR(fcntl(fd.get(), F_GETPATH, canonical_path)) != 0) {
     DPLOG(FATAL) << "GetCanonicalSandboxPath() failed for: "
                  << path.value();
     return path;
diff --git a/content/common/sandbox_mac_system_access_unittest.mm b/content/common/sandbox_mac_system_access_unittest.mm
index 09ac854..4ddc73a 100644
--- a/content/common/sandbox_mac_system_access_unittest.mm
+++ b/content/common/sandbox_mac_system_access_unittest.mm
@@ -5,6 +5,7 @@
 #import <Cocoa/Cocoa.h>
 
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/strings/sys_string_conversions.h"
 #include "content/common/sandbox_mac.h"
@@ -86,9 +87,8 @@ class MacSandboxedFileAccessTestCase : public MacSandboxTestCase {
 REGISTER_SANDBOX_TEST_CASE(MacSandboxedFileAccessTestCase);
 
 bool MacSandboxedFileAccessTestCase::SandboxedTest() {
-  int fdes = open("/etc/passwd", O_RDONLY);
-  file_util::ScopedFD file_closer(&fdes);
-  return fdes == -1;
+  base::ScopedFD fdes(open("/etc/passwd", O_RDONLY));
+  return !fdes.is_valid();
 }
 
 TEST_F(MacSandboxTest, FileAccess) {
@@ -105,15 +105,14 @@ class MacSandboxedUrandomTestCase : public MacSandboxTestCase {
 REGISTER_SANDBOX_TEST_CASE(MacSandboxedUrandomTestCase);
 
 bool MacSandboxedUrandomTestCase::SandboxedTest() {
-  int fdes = open("/dev/urandom", O_RDONLY);
-  file_util::ScopedFD file_closer(&fdes);
+  base::ScopedFD fdes(open("/dev/urandom", O_RDONLY));
 
   // Opening /dev/urandom succeeds under the sandbox.
-  if (fdes == -1)
+  if (!fdes.is_valid())
     return false;
 
   char buf[16];
-  int rc = read(fdes, buf, sizeof(buf));
+  int rc = read(fdes.get(), buf, sizeof(buf));
   return rc == sizeof(buf);
 }
 
diff --git a/ipc/ipc_channel_factory.cc b/ipc/ipc_channel_factory.cc
index 5c24284..244024c 100644
--- a/ipc/ipc_channel_factory.cc
+++ b/ipc/ipc_channel_factory.cc
@@ -5,6 +5,7 @@
 #include "ipc/ipc_channel_factory.h"
 
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "ipc/unix_domain_socket_util.h"
 
@@ -51,21 +52,20 @@ void ChannelFactory::OnFileCanReadWithoutBlocking(int fd) {
     delegate_->OnListenError();
     return;
   }
+  base::ScopedFD scoped_fd(new_fd);
 
-  if (new_fd < 0) {
+  if (!scoped_fd.is_valid()) {
     // The accept() failed, but not in such a way that the factory needs to be
     // shut down.
     return;
   }
 
-  file_util::ScopedFD scoped_fd(&new_fd);
-
   // Verify that the IPC channel peer is running as the same user.
-  if (!IsPeerAuthorized(new_fd))
+  if (!IsPeerAuthorized(scoped_fd.get()))
     return;
 
   ChannelHandle handle(std::string(),
-                       base::FileDescriptor(*scoped_fd.release(), true));
+                       base::FileDescriptor(scoped_fd.release(), true));
   delegate_->OnClientConnected(handle);
 }
 
diff --git a/ipc/unix_domain_socket_util.cc b/ipc/unix_domain_socket_util.cc
index 10df9b2..c29ce92 100644
--- a/ipc/unix_domain_socket_util.cc
+++ b/ipc/unix_domain_socket_util.cc
@@ -13,6 +13,7 @@
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
+#include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/posix/eintr_wrapper.h"
 
@@ -45,15 +46,14 @@ int MakeUnixAddrForPath(const std::string& socket_name,
   }
 
   // Create socket.
-  int fd = socket(AF_UNIX, SOCK_STREAM, 0);
-  if (fd < 0) {
+  base::ScopedFD fd(socket(AF_UNIX, SOCK_STREAM, 0));
+  if (!fd.is_valid()) {
     PLOG(ERROR) << "socket";
     return -1;
   }
-  file_util::ScopedFD scoped_fd(&fd);
 
   // Make socket non-blocking
-  if (HANDLE_EINTR(fcntl(fd, F_SETFL, O_NONBLOCK)) < 0) {
+  if (HANDLE_EINTR(fcntl(fd.get(), F_SETFL, O_NONBLOCK)) < 0) {
     PLOG(ERROR) << "fcntl(O_NONBLOCK)";
     return -1;
   }
@@ -64,7 +64,7 @@ int MakeUnixAddrForPath(const std::string& socket_name,
   strncpy(unix_addr->sun_path, socket_name.c_str(), kMaxSocketNameLength);
   *unix_addr_len =
       offsetof(struct sockaddr_un, sun_path) + socket_name.length();
-  return *scoped_fd.release();
+  return fd.release();
 }
 
 }  // namespace
@@ -78,10 +78,10 @@ bool CreateServerUnixDomainSocket(const base::FilePath& socket_path,
 
   struct sockaddr_un unix_addr;
   size_t unix_addr_len;
-  int fd = MakeUnixAddrForPath(socket_name, &unix_addr, &unix_addr_len);
-  if (fd < 0)
+  base::ScopedFD fd(
+      MakeUnixAddrForPath(socket_name, &unix_addr, &unix_addr_len));
+  if (!fd.is_valid())
     return false;
-  file_util::ScopedFD scoped_fd(&fd);
 
   // Make sure the path we need exists.
   if (!base::CreateDirectory(socket_dir)) {
@@ -96,20 +96,20 @@ bool CreateServerUnixDomainSocket(const base::FilePath& socket_path,
   }
 
   // Bind the socket.
-  if (bind(fd, reinterpret_cast<const sockaddr*>(&unix_addr),
+  if (bind(fd.get(), reinterpret_cast<const sockaddr*>(&unix_addr),
            unix_addr_len) < 0) {
     PLOG(ERROR) << "bind " << socket_path.value();
     return false;
   }
 
   // Start listening on the socket.
-  if (listen(fd, SOMAXCONN) < 0) {
+  if (listen(fd.get(), SOMAXCONN) < 0) {
     PLOG(ERROR) << "listen " << socket_path.value();
     unlink(socket_name.c_str());
     return false;
   }
 
-  *server_listen_fd = *scoped_fd.release();
+  *server_listen_fd = fd.release();
   return true;
 }
 
@@ -122,18 +122,18 @@ bool CreateClientUnixDomainSocket(const base::FilePath& socket_path,
 
   struct sockaddr_un unix_addr;
   size_t unix_addr_len;
-  int fd = MakeUnixAddrForPath(socket_name, &unix_addr, &unix_addr_len);
-  if (fd < 0)
+  base::ScopedFD fd(
+      MakeUnixAddrForPath(socket_name, &unix_addr, &unix_addr_len));
+  if (!fd.is_valid())
     return false;
-  file_util::ScopedFD scoped_fd(&fd);
 
-  if (HANDLE_EINTR(connect(fd, reinterpret_cast<sockaddr*>(&unix_addr),
+  if (HANDLE_EINTR(connect(fd.get(), reinterpret_cast<sockaddr*>(&unix_addr),
                            unix_addr_len)) < 0) {
     PLOG(ERROR) << "connect " << socket_path.value();
     return false;
   }
 
-  *client_socket = *scoped_fd.release();
+  *client_socket = fd.release();
   return true;
 }
 
@@ -184,18 +184,17 @@ bool ServerAcceptConnection(int server_listen_fd, int* server_socket) {
   DCHECK(server_socket);
   *server_socket = -1;
 
-  int accept_fd = HANDLE_EINTR(accept(server_listen_fd, NULL, 0));
-  if (accept_fd < 0)
+  base::ScopedFD accept_fd(HANDLE_EINTR(accept(server_listen_fd, NULL, 0)));
+  if (!accept_fd.is_valid())
     return IsRecoverableError(errno);
-  file_util::ScopedFD scoped_fd(&accept_fd);
-  if (HANDLE_EINTR(fcntl(accept_fd, F_SETFL, O_NONBLOCK)) < 0) {
-    PLOG(ERROR) << "fcntl(O_NONBLOCK) " << accept_fd;
+  if (HANDLE_EINTR(fcntl(accept_fd.get(), F_SETFL, O_NONBLOCK)) < 0) {
+    PLOG(ERROR) << "fcntl(O_NONBLOCK) " << accept_fd.get();
     // It's safe to keep listening on |server_listen_fd| even if the attempt to
     // set O_NONBLOCK failed on the client fd.
     return true;
   }
 
-  *server_socket = *scoped_fd.release();
+  *server_socket = accept_fd.release();
   return true;
 }
 
diff --git a/media/video/capture/linux/video_capture_device_linux.cc b/media/video/capture/linux/video_capture_device_linux.cc
index fa3f83b..7a9ed69 100644
--- a/media/video/capture/linux/video_capture_device_linux.cc
+++ b/media/video/capture/linux/video_capture_device_linux.cc
@@ -19,6 +19,7 @@
 
 #include "base/bind.h"
 #include "base/files/file_enumerator.h"
+#include "base/files/scoped_file.h"
 #include "base/posix/eintr_wrapper.h"
 #include "base/strings/stringprintf.h"
 
@@ -119,19 +120,18 @@ void VideoCaptureDevice::GetDeviceNames(Names* device_names) {
     base::FileEnumerator::FileInfo info = enumerator.GetInfo();
 
     std::string unique_id = path.value() + info.GetName().value();
-    int fd;
-    if ((fd = HANDLE_EINTR(open(unique_id.c_str() , O_RDONLY))) < 0) {
+    base::ScopedFD fd(HANDLE_EINTR(open(unique_id.c_str(), O_RDONLY)));
+    if (!fd.is_valid()) {
       // Failed to open this device.
       continue;
     }
-    file_util::ScopedFD fd_closer(&fd);
     // Test if this is a V4L2 capture device.
     v4l2_capability cap;
-    if ((HANDLE_EINTR(ioctl(fd, VIDIOC_QUERYCAP, &cap)) == 0) &&
+    if ((HANDLE_EINTR(ioctl(fd.get(), VIDIOC_QUERYCAP, &cap)) == 0) &&
         (cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) &&
         !(cap.capabilities & V4L2_CAP_VIDEO_OUTPUT)) {
       // This is a V4L2 video capture device
-      if (HasUsableFormats(fd)) {
+      if (HasUsableFormats(fd.get())) {
         Name device_name(base::StringPrintf("%s", cap.card), unique_id);
         device_names->push_back(device_name);
       } else {
@@ -146,19 +146,18 @@ void VideoCaptureDevice::GetDeviceSupportedFormats(
     VideoCaptureFormats* supported_formats) {
   if (device.id().empty())
     return;
-  int fd;
-  if ((fd = HANDLE_EINTR(open(device.id().c_str(), O_RDONLY))) < 0) {
+  base::ScopedFD fd(HANDLE_EINTR(open(device.id().c_str(), O_RDONLY)));
+  if (!fd.is_valid()) {
     // Failed to open this device.
     return;
   }
-  file_util::ScopedFD fd_closer(&fd);
   supported_formats->clear();
 
   // Retrieve the caps one by one, first get pixel format, then sizes, then
   // frame rates. See http://linuxtv.org/downloads/v4l-dvb-apis for reference.
   v4l2_fmtdesc pixel_format = {};
   pixel_format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-  while (HANDLE_EINTR(ioctl(fd, VIDIOC_ENUM_FMT, &pixel_format)) == 0) {
+  while (HANDLE_EINTR(ioctl(fd.get(), VIDIOC_ENUM_FMT, &pixel_format)) == 0) {
     VideoCaptureFormat supported_format;
     supported_format.pixel_format =
         V4l2ColorToVideoCaptureColorFormat((int32)pixel_format.pixelformat);
@@ -169,7 +168,8 @@ void VideoCaptureDevice::GetDeviceSupportedFormats(
 
     v4l2_frmsizeenum frame_size = {};
     frame_size.pixel_format = pixel_format.pixelformat;
-    while (HANDLE_EINTR(ioctl(fd, VIDIOC_ENUM_FRAMESIZES, &frame_size)) == 0) {
+    while (HANDLE_EINTR(ioctl(fd.get(), VIDIOC_ENUM_FRAMESIZES, &frame_size)) ==
+           0) {
       if (frame_size.type == V4L2_FRMSIZE_TYPE_DISCRETE) {
         supported_format.frame_size.SetSize(
             frame_size.discrete.width, frame_size.discrete.height);
@@ -184,8 +184,8 @@ void VideoCaptureDevice::GetDeviceSupportedFormats(
       frame_interval.pixel_format = pixel_format.pixelformat;
       frame_interval.width = frame_size.discrete.width;
       frame_interval.height = frame_size.discrete.height;
-      while (HANDLE_EINTR(
-                 ioctl(fd, VIDIOC_ENUM_FRAMEINTERVALS, &frame_interval)) == 0) {
+      while (HANDLE_EINTR(ioctl(
+                 fd.get(), VIDIOC_ENUM_FRAMEINTERVALS, &frame_interval)) == 0) {
         if (frame_interval.type == V4L2_FRMIVAL_TYPE_DISCRETE) {
           if (frame_interval.discrete.numerator != 0) {
             supported_format.frame_rate =
@@ -255,13 +255,12 @@ VideoCaptureDevice* VideoCaptureDevice::Create(const Name& device_name) {
   // Test opening the device driver. This is to make sure it is available.
   // We will reopen it again in our worker thread when someone
   // allocates the camera.
-  int fd = HANDLE_EINTR(open(device_name.id().c_str(), O_RDONLY));
-  if (fd < 0) {
+  base::ScopedFD fd(HANDLE_EINTR(open(device_name.id().c_str(), O_RDONLY)));
+  if (!fd.is_valid()) {
     DVLOG(1) << "Cannot open device";
     delete self;
     return NULL;
   }
-  close(fd);
 
   return self;
 }
@@ -269,7 +268,6 @@ VideoCaptureDevice* VideoCaptureDevice::Create(const Name& device_name) {
 VideoCaptureDeviceLinux::VideoCaptureDeviceLinux(const Name& device_name)
     : state_(kIdle),
       device_name_(device_name),
-      device_fd_(-1),
       v4l2_thread_("V4L2Thread"),
       buffer_pool_(NULL),
       buffer_pool_size_(0),
@@ -324,21 +322,19 @@ void VideoCaptureDeviceLinux::OnAllocateAndStart(int width,
   client_ = client.Pass();
 
   // Need to open camera with O_RDWR after Linux kernel 3.3.
-  device_fd_ = HANDLE_EINTR(open(device_name_.id().c_str(), O_RDWR));
-  if (device_fd_ < 0) {
+  device_fd_.reset(HANDLE_EINTR(open(device_name_.id().c_str(), O_RDWR)));
+  if (!device_fd_.is_valid()) {
     SetErrorState("Failed to open V4L2 device driver.");
     return;
   }
-  device_fd_closer_.reset(&device_fd_);
 
   // Test if this is a V4L2 capture device.
   v4l2_capability cap;
-  if (!((HANDLE_EINTR(ioctl(device_fd_, VIDIOC_QUERYCAP, &cap)) == 0) &&
+  if (!((HANDLE_EINTR(ioctl(device_fd_.get(), VIDIOC_QUERYCAP, &cap)) == 0) &&
         (cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) &&
         !(cap.capabilities & V4L2_CAP_VIDEO_OUTPUT))) {
     // This is not a V4L2 video capture device.
-    device_fd_closer_.reset();
-    device_fd_ = -1;
+    device_fd_.reset();
     SetErrorState("This is not a V4L2 video capture device");
     return;
   }
@@ -355,7 +351,8 @@ void VideoCaptureDeviceLinux::OnAllocateAndStart(int width,
 
   // Enumerate image formats.
   std::list<int>::iterator best = v4l2_formats.end();
-  while (HANDLE_EINTR(ioctl(device_fd_, VIDIOC_ENUM_FMT, &fmtdesc)) == 0) {
+  while (HANDLE_EINTR(ioctl(device_fd_.get(), VIDIOC_ENUM_FMT, &fmtdesc)) ==
+         0) {
     best = std::find(v4l2_formats.begin(), best, fmtdesc.pixelformat);
     fmtdesc.index++;
   }
@@ -374,7 +371,7 @@ void VideoCaptureDeviceLinux::OnAllocateAndStart(int width,
   video_fmt.fmt.pix.height = height;
   video_fmt.fmt.pix.pixelformat = *best;
 
-  if (HANDLE_EINTR(ioctl(device_fd_, VIDIOC_S_FMT, &video_fmt)) < 0) {
+  if (HANDLE_EINTR(ioctl(device_fd_.get(), VIDIOC_S_FMT, &video_fmt)) < 0) {
     SetErrorState("Failed to set camera format");
     return;
   }
@@ -384,14 +381,15 @@ void VideoCaptureDeviceLinux::OnAllocateAndStart(int width,
   memset(&streamparm, 0, sizeof(v4l2_streamparm));
   streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
   // The following line checks that the driver knows about framerate get/set.
-  if (HANDLE_EINTR(ioctl(device_fd_, VIDIOC_G_PARM, &streamparm)) >= 0) {
+  if (HANDLE_EINTR(ioctl(device_fd_.get(), VIDIOC_G_PARM, &streamparm)) >= 0) {
     // Now check if the device is able to accept a capture framerate set.
     if (streamparm.parm.capture.capability & V4L2_CAP_TIMEPERFRAME) {
       streamparm.parm.capture.timeperframe.numerator = 1;
       streamparm.parm.capture.timeperframe.denominator =
           (frame_rate) ? frame_rate : kTypicalFramerate;
 
-      if (HANDLE_EINTR(ioctl(device_fd_, VIDIOC_S_PARM, &streamparm)) < 0) {
+      if (HANDLE_EINTR(ioctl(device_fd_.get(), VIDIOC_S_PARM, &streamparm)) <
+          0) {
         SetErrorState("Failed to set camera framerate");
         return;
       }
@@ -419,7 +417,7 @@ void VideoCaptureDeviceLinux::OnAllocateAndStart(int width,
 
   // Start UVC camera.
   v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-  if (HANDLE_EINTR(ioctl(device_fd_, VIDIOC_STREAMON, &type)) == -1) {
+  if (HANDLE_EINTR(ioctl(device_fd_.get(), VIDIOC_STREAMON, &type)) == -1) {
     SetErrorState("VIDIOC_STREAMON failed");
     return;
   }
@@ -436,7 +434,7 @@ void VideoCaptureDeviceLinux::OnStopAndDeAllocate() {
   DCHECK_EQ(v4l2_thread_.message_loop(), base::MessageLoop::current());
 
   v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-  if (HANDLE_EINTR(ioctl(device_fd_, VIDIOC_STREAMOFF, &type)) < 0) {
+  if (HANDLE_EINTR(ioctl(device_fd_.get(), VIDIOC_STREAMOFF, &type)) < 0) {
     SetErrorState("VIDIOC_STREAMOFF failed");
     return;
   }
@@ -447,8 +445,7 @@ void VideoCaptureDeviceLinux::OnStopAndDeAllocate() {
   // We need to close and open the device if we want to change the settings
   // Otherwise VIDIOC_S_FMT will return error
   // Sad but true.
-  device_fd_closer_.reset();
-  device_fd_ = -1;
+  device_fd_.reset();
   state_ = kIdle;
   client_.reset();
 }
@@ -462,7 +459,7 @@ void VideoCaptureDeviceLinux::OnCaptureTask() {
 
   fd_set r_set;
   FD_ZERO(&r_set);
-  FD_SET(device_fd_, &r_set);
+  FD_SET(device_fd_.get(), &r_set);
   timeval timeout;
 
   timeout.tv_sec = 0;
@@ -471,7 +468,7 @@ void VideoCaptureDeviceLinux::OnCaptureTask() {
   // First argument to select is the highest numbered file descriptor +1.
   // Refer to http://linux.die.net/man/2/select for more information.
   int result =
-      HANDLE_EINTR(select(device_fd_ + 1, &r_set, NULL, NULL, &timeout));
+      HANDLE_EINTR(select(device_fd_.get() + 1, &r_set, NULL, NULL, &timeout));
   // Check if select have failed.
   if (result < 0) {
     // EINTR is a signal. This is not really an error.
@@ -500,13 +497,13 @@ void VideoCaptureDeviceLinux::OnCaptureTask() {
   }
 
   // Check if the driver have filled a buffer.
-  if (FD_ISSET(device_fd_, &r_set)) {
+  if (FD_ISSET(device_fd_.get(), &r_set)) {
     v4l2_buffer buffer;
     memset(&buffer, 0, sizeof(buffer));
     buffer.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
     buffer.memory = V4L2_MEMORY_MMAP;
     // Dequeue a buffer.
-    if (HANDLE_EINTR(ioctl(device_fd_, VIDIOC_DQBUF, &buffer)) == 0) {
+    if (HANDLE_EINTR(ioctl(device_fd_.get(), VIDIOC_DQBUF, &buffer)) == 0) {
       client_->OnIncomingCapturedData(
           static_cast<uint8*>(buffer_pool_[buffer.index].start),
           buffer.bytesused,
@@ -515,7 +512,7 @@ void VideoCaptureDeviceLinux::OnCaptureTask() {
           base::TimeTicks::Now());
 
       // Enqueue the buffer again.
-      if (HANDLE_EINTR(ioctl(device_fd_, VIDIOC_QBUF, &buffer)) == -1) {
+      if (HANDLE_EINTR(ioctl(device_fd_.get(), VIDIOC_QBUF, &buffer)) == -1) {
         SetErrorState(base::StringPrintf(
             "Failed to enqueue capture buffer errno %d", errno));
       }
@@ -540,7 +537,7 @@ bool VideoCaptureDeviceLinux::AllocateVideoBuffers() {
   r_buffer.memory = V4L2_MEMORY_MMAP;
   r_buffer.count = kMaxVideoBuffers;
 
-  if (HANDLE_EINTR(ioctl(device_fd_, VIDIOC_REQBUFS, &r_buffer)) < 0) {
+  if (HANDLE_EINTR(ioctl(device_fd_.get(), VIDIOC_REQBUFS, &r_buffer)) < 0) {
     return false;
   }
 
@@ -559,20 +556,20 @@ bool VideoCaptureDeviceLinux::AllocateVideoBuffers() {
     buffer.memory = V4L2_MEMORY_MMAP;
     buffer.index = i;
 
-    if (HANDLE_EINTR(ioctl(device_fd_, VIDIOC_QUERYBUF, &buffer)) < 0) {
+    if (HANDLE_EINTR(ioctl(device_fd_.get(), VIDIOC_QUERYBUF, &buffer)) < 0) {
       return false;
     }
 
     // Some devices require mmap() to be called with both READ and WRITE.
     // See crbug.com/178582.
     buffer_pool_[i].start = mmap(NULL, buffer.length, PROT_READ | PROT_WRITE,
-                                 MAP_SHARED, device_fd_, buffer.m.offset);
+                                 MAP_SHARED, device_fd_.get(), buffer.m.offset);
     if (buffer_pool_[i].start == MAP_FAILED) {
       return false;
     }
     buffer_pool_[i].length = buffer.length;
     // Enqueue the buffer in the drivers incoming queue.
-    if (HANDLE_EINTR(ioctl(device_fd_, VIDIOC_QBUF, &buffer)) < 0) {
+    if (HANDLE_EINTR(ioctl(device_fd_.get(), VIDIOC_QBUF, &buffer)) < 0) {
       return false;
     }
   }
@@ -593,7 +590,7 @@ void VideoCaptureDeviceLinux::DeAllocateVideoBuffers() {
   r_buffer.memory = V4L2_MEMORY_MMAP;
   r_buffer.count = 0;
 
-  if (HANDLE_EINTR(ioctl(device_fd_, VIDIOC_REQBUFS, &r_buffer)) < 0) {
+  if (HANDLE_EINTR(ioctl(device_fd_.get(), VIDIOC_REQBUFS, &r_buffer)) < 0) {
     SetErrorState("Failed to reset buf.");
   }
 
diff --git a/media/video/capture/linux/video_capture_device_linux.h b/media/video/capture/linux/video_capture_device_linux.h
index 4cc1597..6a8dcee 100644
--- a/media/video/capture/linux/video_capture_device_linux.h
+++ b/media/video/capture/linux/video_capture_device_linux.h
@@ -13,6 +13,7 @@
 #include <string>
 
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/threading/thread.h"
 #include "media/video/capture/video_capture_device.h"
 #include "media/video/capture/video_capture_types.h"
@@ -60,8 +61,7 @@ class VideoCaptureDeviceLinux : public VideoCaptureDevice {
   InternalState state_;
   scoped_ptr<VideoCaptureDevice::Client> client_;
   Name device_name_;
-  int device_fd_;  // File descriptor for the opened camera device.
-  file_util::ScopedFD device_fd_closer_;
+  base::ScopedFD device_fd_;  // File descriptor for the opened camera device.
   base::Thread v4l2_thread_;  // Thread used for reading data from the device.
   Buffer* buffer_pool_;
   int buffer_pool_size_;  // Number of allocated buffers.
diff --git a/net/test/spawned_test_server/local_test_server.h b/net/test/spawned_test_server/local_test_server.h
index cfd2eb3..d916835 100644
--- a/net/test/spawned_test_server/local_test_server.h
+++ b/net/test/spawned_test_server/local_test_server.h
@@ -8,6 +8,7 @@
 #include <string>
 
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/process/process_handle.h"
 #include "net/test/spawned_test_server/base_test_server.h"
 
@@ -105,8 +106,7 @@ class LocalTestServer : public BaseTestServer {
 
 #if defined(OS_POSIX)
   // The file descriptor the child writes to when it starts.
-  int child_fd_;
-  file_util::ScopedFD child_fd_closer_;
+  base::ScopedFD child_fd_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(LocalTestServer);
diff --git a/net/test/spawned_test_server/local_test_server_posix.cc b/net/test/spawned_test_server/local_test_server_posix.cc
index 10c2d0f..ea9cab6 100644
--- a/net/test/spawned_test_server/local_test_server_posix.cc
+++ b/net/test/spawned_test_server/local_test_server_posix.cc
@@ -10,6 +10,7 @@
 
 #include "base/command_line.h"
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/process/kill.h"
 #include "base/process/launch.h"
@@ -120,9 +121,8 @@ bool LocalTestServer::LaunchPython(const base::FilePath& testserver_path) {
   }
 
   // Save the read half. The write half is sent to the child.
-  child_fd_ = pipefd[0];
-  child_fd_closer_.reset(&child_fd_);
-  file_util::ScopedFD write_closer(&pipefd[1]);
+  child_fd_.reset(pipefd[0]);
+  base::ScopedFD write_closer(pipefd[1]);
   base::FileHandleMappingVector map_write_fd;
   map_write_fd.push_back(std::make_pair(pipefd[1], pipefd[1]));
 
@@ -148,19 +148,19 @@ bool LocalTestServer::LaunchPython(const base::FilePath& testserver_path) {
 }
 
 bool LocalTestServer::WaitToStart() {
-  file_util::ScopedFD child_fd_closer(child_fd_closer_.release());
+  base::ScopedFD our_fd(child_fd_.release());
 
   base::TimeDelta remaining_time = TestTimeouts::action_timeout();
 
   uint32 server_data_len = 0;
-  if (!ReadData(child_fd_, sizeof(server_data_len),
+  if (!ReadData(our_fd.get(), sizeof(server_data_len),
                 reinterpret_cast<uint8*>(&server_data_len),
                 &remaining_time)) {
     LOG(ERROR) << "Could not read server_data_len";
     return false;
   }
   std::string server_data(server_data_len, '\0');
-  if (!ReadData(child_fd_, server_data_len,
+  if (!ReadData(our_fd.get(), server_data_len,
                 reinterpret_cast<uint8*>(&server_data[0]),
                 &remaining_time)) {
     LOG(ERROR) << "Could not read server_data (" << server_data_len
diff --git a/sandbox/linux/services/broker_process_unittest.cc b/sandbox/linux/services/broker_process_unittest.cc
index 771790a..7f1a685 100644
--- a/sandbox/linux/services/broker_process_unittest.cc
+++ b/sandbox/linux/services/broker_process_unittest.cc
@@ -17,6 +17,7 @@
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/posix/eintr_wrapper.h"
@@ -24,8 +25,6 @@
 #include "sandbox/linux/tests/unit_tests.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-using file_util::ScopedFD;
-
 namespace sandbox {
 
 namespace {
@@ -269,7 +268,7 @@ void TestOpenCpuinfo(bool fast_check_in_client) {
 
   int fd = -1;
   fd = open_broker->Open(kFileCpuInfo, O_RDWR);
-  ScopedFD fd_closer(&fd);
+  base::ScopedFD fd_closer(fd);
   ASSERT_EQ(fd, -EPERM);
 
   // Check we can read /proc/cpuinfo.
@@ -281,7 +280,7 @@ void TestOpenCpuinfo(bool fast_check_in_client) {
 
   // Open cpuinfo via the broker.
   int cpuinfo_fd = open_broker->Open(kFileCpuInfo, O_RDONLY);
-  ScopedFD cpuinfo_fd_closer(&cpuinfo_fd);
+  base::ScopedFD cpuinfo_fd_closer(cpuinfo_fd);
   ASSERT_GE(cpuinfo_fd, 0);
   char buf[3];
   memset(buf, 0, sizeof(buf));
@@ -290,7 +289,7 @@ void TestOpenCpuinfo(bool fast_check_in_client) {
 
   // Open cpuinfo directly.
   int cpuinfo_fd2 = open(kFileCpuInfo, O_RDONLY);
-  ScopedFD cpuinfo_fd2_closer(&cpuinfo_fd2);
+  base::ScopedFD cpuinfo_fd2_closer(cpuinfo_fd2);
   ASSERT_GE(cpuinfo_fd2, 0);
   char buf2[3];
   memset(buf2, 1, sizeof(buf2));
diff --git a/sandbox/linux/services/credentials_unittest.cc b/sandbox/linux/services/credentials_unittest.cc
index 9b792aa..a54ed04 100644
--- a/sandbox/linux/services/credentials_unittest.cc
+++ b/sandbox/linux/services/credentials_unittest.cc
@@ -12,13 +12,12 @@
 #include <unistd.h>
 
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "sandbox/linux/tests/unit_tests.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-using file_util::ScopedFD;
-
 namespace sandbox {
 
 namespace {
@@ -65,7 +64,7 @@ TEST(Credentials, HasOpenDirectory) {
   {
     // Have a "/dev" file descriptor around.
     int dev_fd = open("/dev", O_RDONLY | O_DIRECTORY);
-    ScopedFD dev_fd_closer(&dev_fd);
+    base::ScopedFD dev_fd_closer(dev_fd);
     EXPECT_TRUE(creds.HasOpenDirectory(-1));
   }
   EXPECT_FALSE(creds.HasOpenDirectory(-1));
@@ -75,7 +74,7 @@ TEST(Credentials, HasOpenDirectoryWithFD) {
   Credentials creds;
 
   int proc_fd = open("/proc", O_RDONLY | O_DIRECTORY);
-  ScopedFD proc_fd_closer(&proc_fd);
+  base::ScopedFD proc_fd_closer(proc_fd);
   ASSERT_LE(0, proc_fd);
 
   // Don't pass |proc_fd|, an open directory (proc_fd) should
@@ -87,7 +86,7 @@ TEST(Credentials, HasOpenDirectoryWithFD) {
   {
     // Have a "/dev" file descriptor around.
     int dev_fd = open("/dev", O_RDONLY | O_DIRECTORY);
-    ScopedFD dev_fd_closer(&dev_fd);
+    base::ScopedFD dev_fd_closer(dev_fd);
     EXPECT_TRUE(creds.HasOpenDirectory(proc_fd));
   }
 
diff --git a/sandbox/linux/services/scoped_process_unittest.cc b/sandbox/linux/services/scoped_process_unittest.cc
index 7ae82bf8..2800bd7 100644
--- a/sandbox/linux/services/scoped_process_unittest.cc
+++ b/sandbox/linux/services/scoped_process_unittest.cc
@@ -13,6 +13,7 @@
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/posix/eintr_wrapper.h"
 #include "base/threading/platform_thread.h"
@@ -73,13 +74,13 @@ TEST(ScopedProcess, ScopedProcessSignaled) {
 TEST(ScopedProcess, DiesForReal) {
   int pipe_fds[2];
   ASSERT_EQ(0, pipe(pipe_fds));
-  file_util::ScopedFDCloser read_end_closer(pipe_fds);
-  file_util::ScopedFDCloser write_end_closer(pipe_fds + 1);
+  base::ScopedFD read_end_closer(pipe_fds[0]);
+  base::ScopedFD write_end_closer(pipe_fds[1]);
 
   { ScopedProcess process(base::Bind(&DoExit)); }
 
   // Close writing end of the pipe.
-  ASSERT_EQ(0, IGNORE_EINTR(close(pipe_fds[1])));
+  write_end_closer.reset();
   pipe_fds[1] = -1;
 
   ASSERT_EQ(0, fcntl(pipe_fds[0], F_SETFL, O_NONBLOCK));
@@ -108,8 +109,8 @@ void SleepInMsAndWriteOneByte(int time_to_sleep, int fd) {
 TEST(ScopedProcess, SynchronizationWorks) {
   int pipe_fds[2];
   ASSERT_EQ(0, pipe(pipe_fds));
-  file_util::ScopedFDCloser read_end_closer(pipe_fds);
-  file_util::ScopedFDCloser write_end_closer(pipe_fds + 1);
+  base::ScopedFD read_end_closer(pipe_fds[0]);
+  base::ScopedFD write_end_closer(pipe_fds[1]);
 
   // Start a process with a closure that takes a little bit to run.
   ScopedProcess process(
diff --git a/sandbox/linux/services/yama.cc b/sandbox/linux/services/yama.cc
index efb261c..39ac079 100644
--- a/sandbox/linux/services/yama.cc
+++ b/sandbox/linux/services/yama.cc
@@ -12,6 +12,7 @@
 
 #include "base/basictypes.h"
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/posix/eintr_wrapper.h"
 
@@ -78,18 +79,17 @@ int Yama::GetStatus() {
 
   static const char kPtraceScopePath[] = "/proc/sys/kernel/yama/ptrace_scope";
 
-  int yama_scope = open(kPtraceScopePath, O_RDONLY);
+  base::ScopedFD yama_scope(open(kPtraceScopePath, O_RDONLY));
 
-  if (yama_scope < 0) {
+  if (!yama_scope.is_valid()) {
     const int open_errno = errno;
     DCHECK(ENOENT == open_errno);
     // The status is known, yama is not present.
     return STATUS_KNOWN;
   }
 
-  file_util::ScopedFDCloser yama_scope_closer(&yama_scope);
   char yama_scope_value = 0;
-  ssize_t num_read = read(yama_scope, &yama_scope_value, 1);
+  ssize_t num_read = read(yama_scope.get(), &yama_scope_value, 1);
   PCHECK(1 == num_read);
 
   switch (yama_scope_value) {
diff --git a/tools/android/memdump/memdump.cc b/tools/android/memdump/memdump.cc
index 20684f6..4f4dd14 100644
--- a/tools/android/memdump/memdump.cc
+++ b/tools/android/memdump/memdump.cc
@@ -22,6 +22,7 @@
 #include "base/callback_helpers.h"
 #include "base/containers/hash_tables.h"
 #include "base/file_util.h"
+#include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
@@ -436,13 +437,12 @@ bool CollectProcessMemoryInformation(int page_count_fd,
                                      int page_flags_fd,
                                      ProcessMemory* process_memory) {
   const pid_t pid = process_memory->pid;
-  int pagemap_fd = open(
-      base::StringPrintf("/proc/%d/pagemap", pid).c_str(), O_RDONLY);
-  if (pagemap_fd < 0) {
+  base::ScopedFD pagemap_fd(open(
+      base::StringPrintf("/proc/%d/pagemap", pid).c_str(), O_RDONLY));
+  if (!pagemap_fd.is_valid()) {
     PLOG(ERROR) << "open";
     return false;
   }
-  file_util::ScopedFD auto_closer(&pagemap_fd);
   std::vector<MemoryMap>* const process_maps = &process_memory->memory_maps;
   if (!GetProcessMaps(pid, process_maps))
     return false;
@@ -450,7 +450,7 @@ bool CollectProcessMemoryInformation(int page_count_fd,
        it != process_maps->end(); ++it) {
     std::vector<PageInfo>* const committed_pages = &it->committed_pages;
     BitSet* const pages_bits = &it->committed_pages_bits;
-    GetPagesForMemoryMap(pagemap_fd, *it, committed_pages, pages_bits);
+    GetPagesForMemoryMap(pagemap_fd.get(), *it, committed_pages, pages_bits);
     SetPagesInfo(page_count_fd, page_flags_fd, committed_pages);
   }
   return true;
@@ -489,21 +489,18 @@ int main(int argc, char** argv) {
 
   std::vector<ProcessMemory> processes_memory(pids.size());
   {
-    int page_count_fd = open("/proc/kpagecount", O_RDONLY);
-    if (page_count_fd < 0) {
+    base::ScopedFD page_count_fd(open("/proc/kpagecount", O_RDONLY));
+    if (!page_count_fd.is_valid()) {
       PLOG(ERROR) << "open /proc/kpagecount";
       return EXIT_FAILURE;
     }
 
-    int page_flags_fd = open("/proc/kpageflags", O_RDONLY);
-    if (page_flags_fd < 0) {
+    base::ScopedFD page_flags_fd(open("/proc/kpageflags", O_RDONLY));
+    if (!page_flags_fd.is_valid()) {
       PLOG(ERROR) << "open /proc/kpageflags";
       return EXIT_FAILURE;
     }
 
-    file_util::ScopedFD page_count_fd_closer(&page_count_fd);
-    file_util::ScopedFD page_flags_fd_closer(&page_flags_fd);
-
     base::ScopedClosureRunner auto_resume_processes(
         base::Bind(&KillAll, pids, SIGCONT));
     KillAll(pids, SIGSTOP);
@@ -513,7 +510,7 @@ int main(int argc, char** argv) {
           &processes_memory[it - pids.begin()];
       process_memory->pid = *it;
       if (!CollectProcessMemoryInformation(
-              page_count_fd, page_flags_fd, process_memory)) {
+              page_count_fd.get(), page_flags_fd.get(), process_memory)) {
         return EXIT_FAILURE;
       }
     }