Inject CanAddURLToHistory into TopSitesImpl

net/log/net_log.h

Index: net/log/net_log.h
diff --git a/net/log/net_log.h b/net/log/net_log.h
index 7d32e1c921afc98447d94b16071e6433a015b818..42d40a2e0f106b79b71b58be1f022ae1d411f2b5 100644
--- a/net/log/net_log.h
+++ b/net/log/net_log.h
@@ -261,7 +261,10 @@ class NET_EXPORT NetLog {
   // Returns a C-String symbolic name for |event_phase|.
   static const char* EventPhaseToString(EventPhase event_phase);
 
-  // Creates a ParametersCallback that encapsulates a single integer.
+  // Creates a ParametersCallback that encapsulates a single bool.
+  // Warning: |name| must remain valid for the life of the callback.
+  static ParametersCallback BoolCallback(const char* name, bool value);
+
   // 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);