Removed SSRC knowledge from ViEEncoder.

webrtc/video/encoder_state_feedback.h

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
-
-// TODO(mflodman) ViEEncoder has a time check to not send key frames too often,
-// move the logic to this class.
-
 #ifndef WEBRTC_VIDEO_ENCODER_STATE_FEEDBACK_H_
 #define WEBRTC_VIDEO_ENCODER_STATE_FEEDBACK_H_
 
 #include <vector>
 
 #include "webrtc/base/criticalsection.h"
 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
+#include "webrtc/system_wrappers/include/clock.h"
 #include "webrtc/typedefs.h"
 
 namespace webrtc {
 
 class ViEEncoder;
 
 class EncoderStateFeedback : public RtcpIntraFrameObserver {
  public:
-  EncoderStateFeedback();
+  explicit EncoderStateFeedback(Clock* clock);
 
   // Adds an encoder to receive feedback for a set of SSRCs.
   void Init(const std::vector<uint32_t>& ssrc, ViEEncoder* encoder);
 
   void OnReceivedIntraFrameRequest(uint32_t ssrc) override;
   void OnReceivedSLI(uint32_t ssrc, uint8_t picture_id) override;
   void OnReceivedRPSI(uint32_t ssrc, uint64_t picture_id) override;
   void OnLocalSsrcChanged(uint32_t old_ssrc, uint32_t new_ssrc) override;
 
  private:
   bool HasSsrc(uint32_t ssrc) EXCLUSIVE_LOCKS_REQUIRED(crit_);
+  size_t GetStreamIndex(uint32_t ssrc) EXCLUSIVE_LOCKS_REQUIRED(crit_);
+
+  Clock* const clock_;
   rtc::CriticalSection crit_;
 
   std::vector<uint32_t> ssrcs_ GUARDED_BY(crit_);
+  std::vector<int64_t> time_last_intra_request_ms_ GUARDED_BY(crit_);
   ViEEncoder* vie_encoder_ GUARDED_BY(crit_);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_VIDEO_ENCODER_STATE_FEEDBACK_H_