Componentize DriveMetricsProvider*

chrome/browser/metrics/drive_metrics_provider_mac.mm

Index: chrome/browser/metrics/drive_metrics_provider_mac.mm
diff --git a/chrome/browser/metrics/drive_metrics_provider_mac.mm b/chrome/browser/metrics/drive_metrics_provider_mac.mm
deleted file mode 100644
index 565acd8c3e3f7da17f0465b089096d443c792761..0000000000000000000000000000000000000000
--- a/chrome/browser/metrics/drive_metrics_provider_mac.mm
+++ /dev/null
@@ -1,74 +0,0 @@
-// 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 "chrome/browser/metrics/drive_metrics_provider.h"
-
-#include <CoreFoundation/CoreFoundation.h>
-#include <DiskArbitration/DiskArbitration.h>
-#include <Foundation/Foundation.h>
-#include <IOKit/IOKitLib.h>
-#include <IOKit/storage/IOStorageDeviceCharacteristics.h>
-#include <stdlib.h>
-#include <sys/stat.h>
-
-#include "base/files/file_path.h"
-#include "base/mac/foundation_util.h"
-#include "base/mac/mac_util.h"
-#include "base/mac/scoped_cftyperef.h"
-#include "base/mac/scoped_ioobject.h"
-
-// static
-bool DriveMetricsProvider::HasSeekPenalty(const base::FilePath& path,
-                                          bool* has_seek_penalty) {
-  struct stat path_stat;
-  if (stat(path.value().c_str(), &path_stat) < 0)
-    return false;
-
-  const char* dev_name = devname(path_stat.st_dev, S_IFBLK);
-  if (!dev_name)
-    return false;
-
-  std::string bsd_name("/dev/");
-  bsd_name.append(dev_name);
-
-  base::ScopedCFTypeRef<DASessionRef> session(
-      DASessionCreate(kCFAllocatorDefault));
-  if (!session)
-    return false;
-
-  base::ScopedCFTypeRef<DADiskRef> disk(DADiskCreateFromBSDName(
-      kCFAllocatorDefault, session, bsd_name.c_str()));
-  if (!disk)
-    return false;
-
-  base::mac::ScopedIOObject<io_object_t> io_media(DADiskCopyIOMedia(disk));
-  base::ScopedCFTypeRef<CFDictionaryRef> characteristics(
-      static_cast<CFDictionaryRef>(IORegistryEntrySearchCFProperty(
-          io_media,
-          kIOServicePlane,
-          CFSTR(kIOPropertyDeviceCharacteristicsKey),
-          kCFAllocatorDefault,
-          kIORegistryIterateRecursively | kIORegistryIterateParents)));
-  if (!characteristics)
-    return false;
-
-  CFStringRef type_ref = base::mac::GetValueFromDictionary<CFStringRef>(
-      characteristics, CFSTR(kIOPropertyMediumTypeKey));
-  if (!type_ref)
-    return false;
-
-  NSString* type = base::mac::CFToNSCast(type_ref);
-  if ([type isEqualToString:@kIOPropertyMediumTypeRotationalKey]) {
-    *has_seek_penalty = true;
-    return true;
-  } else if ([type isEqualToString:@kIOPropertyMediumTypeSolidStateKey]) {
-    *has_seek_penalty = false;
-    return true;
-  }
-
-  // TODO(dbeam): should I look for these Rotational/Solid State keys in
-  // |characteristics|? What if I find device characteristic but there's no
-  // type? Assume rotational?
-  return false;
-}