Remove some PlatformFile uses from NaCl.

components/nacl/browser/nacl_browser.cc

 // Copyright 2013 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 "components/nacl/browser/nacl_browser.h"
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram.h"
@@ skipping 101 matching lines @@
 }
 
 // Crash throttling parameters.
 const size_t kMaxCrashesPerInterval = 3;
 const int64 kCrashesIntervalInSeconds = 120;
 
 }  // namespace
 
 namespace nacl {
 
-base::PlatformFile OpenNaClExecutableImpl(const base::FilePath& file_path) {
+base::File OpenNaClExecutableImpl(const base::FilePath& file_path) {
   // Get a file descriptor. On Windows, we need 'GENERIC_EXECUTE' in order to
   // memory map the executable.
   // IMPORTANT: This file descriptor must not have write access - that could
   // allow a NaCl inner sandbox escape.
-  base::PlatformFile file;
-  base::PlatformFileError error_code;
-  file = base::CreatePlatformFile(
-      file_path,
-      (base::PLATFORM_FILE_OPEN |
-       base::PLATFORM_FILE_READ |
-       base::PLATFORM_FILE_EXECUTE),  // Windows only flag.
-      NULL,
-      &error_code);
-  if (error_code != base::PLATFORM_FILE_OK)
-    return base::kInvalidPlatformFileValue;
+  base::File file(file_path,
+                  (base::File::FLAG_OPEN |
+                   base::File::FLAG_READ |
+                   base::File::FLAG_EXECUTE));  // Windows only flag.
+  if (!file.IsValid())
+    return file.Pass();
 
   // Check that the file does not reference a directory. Returning a descriptor
   // to an extension directory could allow an outer sandbox escape. openat(...)
   // could be used to traverse into the file system.
-  base::PlatformFileInfo file_info;
-  if (!base::GetPlatformFileInfo(file, &file_info) || file_info.is_directory) {
-    base::ClosePlatformFile(file);
-    return base::kInvalidPlatformFileValue;
-  }
-  return file;
+  base::File::Info file_info;
+  if (!file.GetInfo(&file_info) || file_info.is_directory)
+    return base::File();
+
+  return file.Pass();
 }
 
 NaClBrowser::NaClBrowser()
     : weak_factory_(this),
       irt_platform_file_(base::kInvalidPlatformFileValue),
       irt_filepath_(),
       irt_state_(NaClResourceUninitialized),
       validation_cache_file_path_(),
       validation_cache_is_enabled_(
           CheckEnvVar("NACL_VALIDATION_CACHE",
@@ skipping 400 matching lines @@
 bool NaClBrowser::IsThrottled() {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
   if (crash_times_.size() != kMaxCrashesPerInterval) {
     return false;
   }
   base::TimeDelta delta = base::Time::Now() - crash_times_.front();
   return delta.InSeconds() <= kCrashesIntervalInSeconds;
 }
 
 }  // namespace nacl