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

base/sys_info_posix.cc

Index: base/sys_info_posix.cc
diff --git a/base/sys_info_posix.cc b/base/sys_info_posix.cc
index 85ae039118986d211ea3964e38f271c4beb3a026..168e3aee5365a41ee3c9c9f27105655c0ee646fd 100644
--- a/base/sys_info_posix.cc
+++ b/base/sys_info_posix.cc
@@ -90,12 +90,25 @@ int64_t SysInfo::AmountOfVirtualMemory() {
 
 // static
 int64_t SysInfo::AmountOfFreeDiskSpace(const FilePath& path) {
-  base::ThreadRestrictions::AssertIOAllowed();
+  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();
 
   struct statvfs stats;
   if (HANDLE_EINTR(statvfs(path.value().c_str(), &stats)) != 0)
-    return -1;
-  return static_cast<int64_t>(stats.f_bavail) * stats.f_frsize;
+    return false;
+
+  *available_bytes = static_cast<int64_t>(stats.f_bavail) * stats.f_frsize;
+  *total_bytes = static_cast<int64_t>(stats.f_blocks) * stats.f_frsize;
+  return true;
 }
 
 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)