Revert of Implement ScopedFD in terms of ScopedGeneric.

base/debug/proc_maps_linux.cc

Index: base/debug/proc_maps_linux.cc
diff --git a/base/debug/proc_maps_linux.cc b/base/debug/proc_maps_linux.cc
index a956961b7a5a147f4757b09eb898edb260888edd..b7a5862f7472aceb3c8cece84b4e9578641fe19a 100644
--- a/base/debug/proc_maps_linux.cc
+++ b/base/debug/proc_maps_linux.cc
@@ -11,7 +11,6 @@
 #endif
 
 #include "base/file_util.h"
-#include "base/files/scoped_file.h"
 #include "base/strings/string_split.h"
 
 #if defined(OS_ANDROID)
@@ -46,11 +45,12 @@
   // file for details.
   const long kReadSize = sysconf(_SC_PAGESIZE);
 
-  base::ScopedFD fd(HANDLE_EINTR(open("/proc/self/maps", O_RDONLY)));
-  if (!fd.is_valid()) {
+  int fd = HANDLE_EINTR(open("/proc/self/maps", O_RDONLY));
+  if (fd == -1) {
     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 @@
     proc_maps->resize(pos + kReadSize);
     void* buffer = &(*proc_maps)[pos];
 
-    ssize_t bytes_read = HANDLE_EINTR(read(fd.get(), buffer, kReadSize));
+    ssize_t bytes_read = HANDLE_EINTR(read(fd, buffer, kReadSize));
     if (bytes_read < 0) {
       DPLOG(ERROR) << "Couldn't read /proc/self/maps";
       proc_maps->clear();