Fix a browser crash when the async resource handler keeps an...

base/shared_memory.h

Index: base/shared_memory.h
===================================================================
--- base/shared_memory.h	(revision 9407)
+++ base/shared_memory.h	(working copy)
@@ -113,6 +113,8 @@
   //   bool ok = ShareToProcess(process, new_handle);
   //   Close();
   //   return ok;
+  // Note that the memory is unmapped by calling this method, regardless of the
+  // return value.
   bool GiveToProcess(ProcessHandle process,
                      SharedMemoryHandle* new_handle) {
     return ShareToProcessCommon(process, new_handle, true);