Simple Cache: Add two optional stream 2 histograms

net/disk_cache/simple/simple_net_log_parameters.h

Index: net/disk_cache/simple/simple_net_log_parameters.h
diff --git a/net/disk_cache/simple/simple_net_log_parameters.h b/net/disk_cache/simple/simple_net_log_parameters.h
index b6f386f4a9939833b27fc1d2f1aab0a7950be941..41ea9a2af91695805b1e41c4df258b108208a052 100644
--- a/net/disk_cache/simple/simple_net_log_parameters.h
+++ b/net/disk_cache/simple/simple_net_log_parameters.h
@@ -14,14 +14,14 @@ namespace disk_cache {
 class SimpleEntryImpl;
 
 // Creates a NetLog callback that returns parameters for the construction of a
-// SimpleEntryImpl.  Contains the entry's hash.  |entry| can't be NULL and must
+// SimpleEntryImpl. Contains the entry's hash. |entry| can't be NULL and must
 // outlive the returned callback.
 net::NetLog::ParametersCallback CreateNetLogSimpleEntryConstructionCallback(
     const SimpleEntryImpl* entry);
 
 // Creates a NetLog callback that returns parameters for the result of calling
-// |CreateEntry| or |OpenEntry| on a SimpleEntryImpl.  Contains the |net_error|
-// and, if successful, the entry's key.  |entry| can't be NULL and must outlive
+// |CreateEntry| or |OpenEntry| on a SimpleEntryImpl. Contains the |net_error|
+// and, if successful, the entry's key. |entry| can't be NULL and must outlive
 // the returned callback.
 net::NetLog::ParametersCallback CreateNetLogSimpleEntryCreationCallback(
     const SimpleEntryImpl* entry,