Add support for negotiating RTCP with reduced size.

talk/session/media/mediasession.h

Index: talk/session/media/mediasession.h
diff --git a/talk/session/media/mediasession.h b/talk/session/media/mediasession.h
index 5bcc8cc55bd6cd29245af1c71308763f49987269..c588109906693c61a98d2744cb3157716ef43c42 100644
--- a/talk/session/media/mediasession.h
+++ b/talk/session/media/mediasession.h
@@ -169,6 +169,7 @@ class MediaContentDescription : public ContentDescription {
  public:
   MediaContentDescription()
       : rtcp_mux_(false),
+        rtcp_reduced_size_(false),
         bandwidth_(kAutoBandwidth),
         crypto_required_(CT_NONE),
         rtp_header_extensions_set_(false),
@@ -176,8 +177,7 @@ class MediaContentDescription : public ContentDescription {
         conference_mode_(false),
         partial_(false),
         buffered_mode_latency_(kBufferedModeDisabled),
-        direction_(MD_SENDRECV) {
-  }
+        direction_(MD_SENDRECV) {}
 
   virtual MediaType type() const = 0;
   virtual bool has_codecs() const = 0;
@@ -195,6 +195,11 @@ class MediaContentDescription : public ContentDescription {
   bool rtcp_mux() const { return rtcp_mux_; }
   void set_rtcp_mux(bool mux) { rtcp_mux_ = mux; }
 
+  bool rtcp_reduced_size() const { return rtcp_reduced_size_; }
+  void set_rtcp_reduced_size(bool reduced_size) {
+    rtcp_reduced_size_ = reduced_size;
+  }
+
   int bandwidth() const { return bandwidth_; }
   void set_bandwidth(int bandwidth) { bandwidth_ = bandwidth; }
 
@@ -292,6 +297,7 @@ class MediaContentDescription : public ContentDescription {
 
  protected:
   bool rtcp_mux_;
+  bool rtcp_reduced_size_;
   int bandwidth_;
   std::string protocol_;
   std::vector<CryptoParams> cryptos_;