[SystemInfo API] Rewrite storage info provider using storage monitor impl

chrome/browser/extensions/api/system_info_storage/storage_info_provider_win.cc

Index: chrome/browser/extensions/api/system_info_storage/storage_info_provider_win.cc
diff --git a/chrome/browser/extensions/api/system_info_storage/storage_info_provider_win.cc b/chrome/browser/extensions/api/system_info_storage/storage_info_provider_win.cc
deleted file mode 100644
index b9257fccb3ca115186d0d1cc1495d06a095808ed..0000000000000000000000000000000000000000
--- a/chrome/browser/extensions/api/system_info_storage/storage_info_provider_win.cc
+++ /dev/null
@@ -1,103 +0,0 @@
-// Copyright (c) 2012 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/extensions/api/system_info_storage/storage_info_provider.h"
-
-#include "base/string_util.h"
-#include "base/utf_string_conversions.h"
-#include <windows.h>
-
-namespace extensions {
-
-namespace {
-
-using api::experimental_system_info_storage::StorageUnitInfo;
-
-// Logical drive string length is 4. It contains one driver letter character,
-// L":", L"\" and a terminating null character.
-const unsigned long kMaxLogicalDriveString = 4 * 26;
-
-// StorageInfoProvider implementation on Windows platform.
-class StorageInfoProviderWin : public StorageInfoProvider {
- public:
-  StorageInfoProviderWin() {}
-
-  virtual bool QueryInfo(StorageInfo* info) OVERRIDE;
-  virtual bool QueryUnitInfo(const std::string& id,
-                             StorageUnitInfo* info) OVERRIDE;
- private:
-  virtual ~StorageInfoProviderWin() {}
-};
-
-bool StorageInfoProviderWin::QueryInfo(StorageInfo* info) {
-  info->clear();
-
-  WCHAR logical_drive_strings[kMaxLogicalDriveString];
-
-  // The total length of drive string returned from GetLogicalDriveStrings
-  // must be divided exactly by 4 since each drive is represented by 4 wchars.
-  DWORD string_length = GetLogicalDriveStrings(
-      kMaxLogicalDriveString - 1, logical_drive_strings);
-  DCHECK(string_length % 4 == 0);
-  // No drive found, return false.
-  if (string_length == 0)
-    return false;
-
-  // Iterate the drive string by 4 wchars each step
-  for (unsigned int i = 0; i < string_length; i += 4) {
-    linked_ptr<StorageUnitInfo> unit(new StorageUnitInfo());
-    if (QueryUnitInfo(WideToUTF8(&logical_drive_strings[i]), unit.get())) {
-      info->push_back(unit);
-    }
-  }
-  return true;
-}
-
-bool StorageInfoProviderWin::QueryUnitInfo(const std::string& id,
-                                           StorageUnitInfo* info) {
-  DCHECK(info);
-  string16 drive = UTF8ToUTF16(id);
-
-  std::string type;
-  DWORD ret = GetDriveType(drive.c_str());
-  switch (ret) {
-    case DRIVE_FIXED:
-      type = systeminfo::kStorageTypeFixed;
-      break;
-    case DRIVE_REMOVABLE:
-      type = systeminfo::kStorageTypeRemovable;
-      break;
-    case DRIVE_UNKNOWN:
-      type = systeminfo::kStorageTypeUnknown;
-      break;
-    case DRIVE_CDROM:       // CD ROM
-    case DRIVE_REMOTE:      // Remote network drive
-    case DRIVE_NO_ROOT_DIR: // Invalid root path
-    case DRIVE_RAMDISK:     // RAM disk
-      // TODO(hmin): Do we need to care about these drive types?
-      return false;
-  }
-
-  ULARGE_INTEGER total_bytes;
-  ULARGE_INTEGER free_bytes;
-
-  if (GetDiskFreeSpaceEx(drive.c_str(), NULL, &total_bytes, &free_bytes)) {
-    info->id = id;
-    info->type =
-        api::experimental_system_info_storage::ParseStorageUnitType(type);
-    info->capacity = static_cast<double>(total_bytes.QuadPart);
-    info->available_capacity = static_cast<double>(free_bytes.QuadPart);
-    return true;
-  }
-  return false;
-}
-
-}  // namespace
-
-// static
-StorageInfoProvider* StorageInfoProvider::Get() {
-  return StorageInfoProvider::GetInstance<StorageInfoProviderWin>();
-}
-
-}  // namespace extensions