Revert of Revert of Adding CopresenceState

components/copresence/handlers/directive_handler_impl.h

Index: components/copresence/handlers/directive_handler_impl.h
diff --git a/components/copresence/handlers/directive_handler_impl.h b/components/copresence/handlers/directive_handler_impl.h
index 6659e43addfd1031b70c4966a57f667a910a5c5b..b507b5f27038e2b97875e7f73d6025e8e2f446d3 100644
--- a/components/copresence/handlers/directive_handler_impl.h
+++ b/components/copresence/handlers/directive_handler_impl.h
@@ -13,17 +13,21 @@
 
 #include "base/memory/scoped_ptr.h"
 #include "components/copresence/handlers/audio/audio_directive_handler_impl.h"
+#include "components/copresence/public/copresence_constants.h"
 
 namespace copresence {
 
 // The directive handler manages transmit and receive directives.
 class DirectiveHandlerImpl final : public DirectiveHandler {
  public:
-  explicit DirectiveHandlerImpl(scoped_ptr<AudioDirectiveHandler>
-      audio_handler = make_scoped_ptr(new AudioDirectiveHandlerImpl));
+  explicit DirectiveHandlerImpl(
+      const DirectivesCallback& update_directives_callback);
+  DirectiveHandlerImpl(
+      const DirectivesCallback& update_directives_callback,
+      scoped_ptr<AudioDirectiveHandler> audio_handler);
   ~DirectiveHandlerImpl() override;
 
-  // DirectiveHandler overrides
+  // DirectiveHandler overrides.
   void Start(WhispernetClient* whispernet_client,
              const TokensCallback& tokens_cb) override;
   void AddDirective(const Directive& directive) override;