Make transport security state data source configurable.

net/http/transport_security_state.h

Index: net/http/transport_security_state.h
diff --git a/net/http/transport_security_state.h b/net/http/transport_security_state.h
index a55cf62d417cada4728bc7a810b4efb6980e8b17..525d6839e44b8de975f69832b84fa303cf0382f2 100644
--- a/net/http/transport_security_state.h
+++ b/net/http/transport_security_state.h
@@ -19,6 +19,7 @@
 #include "net/base/expiring_cache.h"
 #include "net/base/hash_value.h"
 #include "net/base/net_export.h"
+#include "net/http/transport_security_state_structs.h"
 #include "url/gurl.h"
 
 namespace net {
@@ -27,6 +28,14 @@ class HostPortPair;
 class SSLInfo;
 class X509Certificate;
 
+// Sets the transport security state data source.
+void NET_EXPORT_PRIVATE
+SetTransportSecurityStateSource(const TransportSecurityStateSource* source);

[Ryan Sleevi, 2017/03/13 18:31:18]

When is this used? Testing only?

SetTransportSecurityStateSourceForTesting()?

[martijnc, 2017/03/13 21:51:40]

Yes, this is only used in tests. Renamed.

+
+// Sets the transport security state data source back to the default source
+// (transport_security_state_static.h).
+void NET_EXPORT_PRIVATE SetDefaultTransportSecurityStateSource();

[Ryan Sleevi, 2017/03/13 18:31:18]

Why is this needed? Our normal pattern for overriding defaults let's a nullptr
be seen as the 'reset to default' equivalent.

[martijnc, 2017/03/13 21:51:40]

This was used to set the source back to the default so that other tests weren't
affected.

Didn't know that, thanks. Removed.

+
 // Tracks which hosts have enabled strict transport security and/or public
 // key pins.
 //