Revert of Remove VCMQmRobustness.

webrtc/modules/video_coding/qm_select.h

Index: webrtc/modules/video_coding/qm_select.h
diff --git a/webrtc/modules/video_coding/qm_select.h b/webrtc/modules/video_coding/qm_select.h
index ae0463f4997b6ee1732a743ed9acf5b5e944bc08..764b5ed8e37e3238c60996c14327c1a4db62137e 100644
--- a/webrtc/modules/video_coding/qm_select.h
+++ b/webrtc/modules/video_coding/qm_select.h
@@ -322,5 +322,35 @@
   int num_layers_;
 };
 
+// Robustness settings class.
+
+class VCMQmRobustness : public VCMQmMethod {
+ public:
+  VCMQmRobustness();
+  ~VCMQmRobustness();
+
+  virtual void Reset();
+
+  // Adjust FEC rate based on content: every ~1 sec from SetTargetRates.
+  // Returns an adjustment factor.
+  float AdjustFecFactor(uint8_t code_rate_delta,
+                        float total_rate,
+                        float framerate,
+                        int64_t rtt_time,
+                        uint8_t packet_loss);
+
+  // Set the UEP protection on/off.
+  bool SetUepProtection(uint8_t code_rate_delta,
+                        float total_rate,
+                        uint8_t packet_loss,
+                        bool frame_type);
+
+ private:
+  // Previous state of network parameters.
+  float prev_total_rate_;
+  int64_t prev_rtt_time_;
+  uint8_t prev_packet_loss_;
+  uint8_t prev_code_rate_delta_;
+};
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_VIDEO_CODING_QM_SELECT_H_