Fix WebRtcFrameScheduler to wait for first key frame request.

remoting/protocol/fake_session.h

Index: remoting/protocol/fake_session.h
diff --git a/remoting/protocol/fake_session.h b/remoting/protocol/fake_session.h
index b7b02c8bd5f78c7321da6eb43f1e5592fcf9c258..b346f9cf4d1b686d8341a407595e110592f03512 100644
--- a/remoting/protocol/fake_session.h
+++ b/remoting/protocol/fake_session.h
@@ -12,6 +12,7 @@
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
+#include "base/time/time.h"
 #include "remoting/protocol/fake_stream_socket.h"
 #include "remoting/protocol/session.h"
 #include "remoting/protocol/transport.h"
@@ -34,6 +35,11 @@ class FakeSession : public Session {
   void set_error(ErrorCode error) { error_ = error; }
   bool is_closed() const { return closed_; }
 
+  // Sets delay for signaling message deliver when connected to a peer.
+  void set_signaling_delay(base::TimeDelta signaling_delay) {
+    signaling_delay_ = signaling_delay;
+  }
+
   // Session interface.
   void SetEventHandler(EventHandler* event_handler) override;
   ErrorCode error() override;
@@ -46,6 +52,9 @@ class FakeSession : public Session {
   // Callback provided to the |transport_|.
   void SendTransportInfo(std::unique_ptr<buzz::XmlElement> transport_info);
 
+  // Called by the |peer_| to deliver incoming |transport_info|.
+  void ProcessTransportInfo(std::unique_ptr<buzz::XmlElement> transport_info);
+
   EventHandler* event_handler_ = nullptr;
   std::unique_ptr<SessionConfig> config_;
 
@@ -58,6 +67,7 @@ class FakeSession : public Session {
   bool closed_ = false;
 
   base::WeakPtr<FakeSession> peer_;
+  base::TimeDelta signaling_delay_;
 
   base::WeakPtrFactory<FakeSession> weak_factory_;