NetLogEventParameter to Callback refactoring 11.

net/base/net_log.h

Index: net/base/net_log.h
===================================================================
--- net/base/net_log.h	(revision 142108)
+++ net/base/net_log.h	(working copy)
@@ -298,8 +298,15 @@
 
   // Creates a ParametersCallback that encapsulates a single integer.
   // Warning: |name| must remain valid for the life of the callback.
+  // TODO(mmenke):  Rename this to be consistent with Int64Callback.
   static ParametersCallback IntegerCallback(const char* name, int value);
 
+  // Creates a ParametersCallback that encapsulates a single int64.  The
+  // callback will return the value as a StringValue, since IntegerValues
+  // only support 32-bit values.
+  // Warning: |name| must remain valid for the life of the callback.
+  static ParametersCallback Int64Callback(const char* name, int64 value);
+
   // Creates a ParametersCallback that encapsulates a single UTF8 string.  Takes
   // |value| as a pointer to avoid copying, and emphasize it must be valid for
   // the life of the callback.  |value| may not be NULL.