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..4df96587f968d09a24a349d902101850e8bd115e 100644
--- a/base/sys_info_posix.cc
+++ b/base/sys_info_posix.cc
@@ -98,6 +98,21 @@ int64_t SysInfo::AmountOfFreeDiskSpace(const FilePath& path) {
   return static_cast<int64_t>(stats.f_bavail) * stats.f_frsize;

[Dan Beam, 2016/06/09 17:20:13]

nit: maybe use GetDiskSpaceInfo() to implement AmountOfFreeDiskSpace?

int64_t available, unused;
if (!GetDiskSpaceInfo(path, &available, &unused))
  return -1;
return available;

OR

share the stat'ing code?

bool Stat(const char* path, statvfs* stats) {
  return HANDLE_EINTR(statvfs(path, stats)) != 0;
}

and from both

struct statvfs stats;
if (!Stat(path.value().c_str(), &stats))
  return false;  // or -1

[fukino, 2016/06/10 01:33:36]

Done.
I updated this to use GetDiskSpaceInfo() in AmountOfFreeDiskSpace.

 }
 
+// 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 false;
+
+  *available_bytes = static_cast<uint64_t>(stats.f_bavail) * stats.f_frsize;
+  *total_bytes = static_cast<uint64_t>(stats.f_blocks) * stats.f_frsize;
+  return true;
+}
+
 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
 // static
 std::string SysInfo::OperatingSystemName() {