Move implementation of QuotaManager.getVolumeInfo to base::SysInfo.

base/sys_info_win.cc

Index: base/sys_info_win.cc
diff --git a/base/sys_info_win.cc b/base/sys_info_win.cc
index d2c7bcddc148d1693946fbb26086f676f85b1423..7ffb8e1a13c79bd3f2c2ed29938677865d198805 100644
--- a/base/sys_info_win.cc
+++ b/base/sys_info_win.cc
@@ -56,14 +56,29 @@ int64_t SysInfo::AmountOfVirtualMemory() {
 
 // static
 int64_t SysInfo::AmountOfFreeDiskSpace(const FilePath& path) {
+  int64_t available, unused;
+  if (!GetDiskSpaceInfo(path, &available, &unused))
+    return -1;
+  return available;
+}
+
+// static
+bool SysInfo::GetDiskSpaceInfo(const FilePath& path,
+                               int64_t* available_bytes,
+                               int64_t* total_bytes) {
   ThreadRestrictions::AssertIOAllowed();
 
   ULARGE_INTEGER available, total, free;
   if (!GetDiskFreeSpaceExW(path.value().c_str(), &available, &total, &free))
-    return -1;
-
-  int64_t rv = static_cast<int64_t>(available.QuadPart);
-  return rv < 0 ? std::numeric_limits<int64_t>::max() : rv;
+    return false;
+
+  *available_bytes = static_cast<int64_t>(available.QuadPart);
+  if (*available_bytes < 0)
+    *available_bytes = std::numeric_limits<int64_t>::max();
+  *total_bytes = static_cast<int64_t>(total.QuadPart);
+  if (*total_bytes < 0)
+    *total_bytes = std::numeric_limits<int64_t>::max();
+  return true;
 }
 
 std::string SysInfo::OperatingSystemName() {