1 files changed, 7 insertions, 4 deletions
diff --git a/chromium/sandbox/linux/services/thread_helpers.h b/chromium/sandbox/linux/services/thread_helpers.h
index 651e5d9c501..377742a539a 100644
--- a/chromium/sandbox/linux/services/thread_helpers.h
+++ b/chromium/sandbox/linux/services/thread_helpers.h
@@ -6,16 +6,19 @@
 #define SANDBOX_LINUX_SERVICES_THREAD_HELPERS_H_
 
 #include "base/basictypes.h"
+#include "sandbox/sandbox_export.h"
 
 namespace base { class Thread; }
 
 namespace sandbox {
 
-class ThreadHelpers {
+class SANDBOX_EXPORT ThreadHelpers {
  public:
   // Check whether the current process is single threaded. |proc_self_tasks|
-  // should be a file descriptor to /proc/self/task/ and remains owned by the
-  // caller.
+  // can be a file descriptor to /proc/self/task/ and remains owned by the
+  // caller or -1.
+  // If |proc_self_tasks| is -1, this method will open /proc/self/task/ and
+  // crash if it cannot.
   static bool IsSingleThreaded(int proc_self_task);
 
   // Stop |thread| and ensure that it does not have an entry in
@@ -28,6 +31,6 @@ class ThreadHelpers {
   DISALLOW_IMPLICIT_CONSTRUCTORS(ThreadHelpers);
 };
 
-}  // namespace content
+}  // namespace sandbox
 
 #endif  // SANDBOX_LINUX_SERVICES_THREAD_HELPERS_H_