Pepper: Add support for multicast in PPB_UDPSocket API

content/browser/renderer_host/pepper/pepper_udp_socket_message_filter.h

Index: content/browser/renderer_host/pepper/pepper_udp_socket_message_filter.h
diff --git a/content/browser/renderer_host/pepper/pepper_udp_socket_message_filter.h b/content/browser/renderer_host/pepper/pepper_udp_socket_message_filter.h
index 50aa6914f53819b2af20a4729f3583a9667a55ef..c6ca536e524dc522f26a1a9fd48b82553e638e93 100644
--- a/content/browser/renderer_host/pepper/pepper_udp_socket_message_filter.h
+++ b/content/browser/renderer_host/pepper/pepper_udp_socket_message_filter.h
@@ -61,7 +61,9 @@ class CONTENT_EXPORT PepperUDPSocketMessageFilter
     SOCKET_OPTION_ADDRESS_REUSE = 1 << 0,
     SOCKET_OPTION_BROADCAST = 1 << 1,
     SOCKET_OPTION_RCVBUF_SIZE = 1 << 2,
-    SOCKET_OPTION_SNDBUF_SIZE = 1 << 3
+    SOCKET_OPTION_SNDBUF_SIZE = 1 << 3,
+    SOCKET_OPTION_MULTICAST_LOOP = 1 << 4,
+    SOCKET_OPTION_MULTICAST_TTL = 1 << 5
   };
 
   struct PendingSend {
@@ -95,6 +97,10 @@ class CONTENT_EXPORT PepperUDPSocketMessageFilter
   int32_t OnMsgClose(const ppapi::host::HostMessageContext* context);
   int32_t OnMsgRecvSlotAvailable(
       const ppapi::host::HostMessageContext* context);
+  int32_t OnMsgJoinGroup(const ppapi::host::HostMessageContext* context,
+                         const PP_NetAddress_Private& addr);
+  int32_t OnMsgLeaveGroup(const ppapi::host::HostMessageContext* context,
+                          const PP_NetAddress_Private& addr);
 
   void DoBind(const ppapi::host::ReplyMessageContext& context,
               const PP_NetAddress_Private& addr);
@@ -125,6 +131,8 @@ class CONTENT_EXPORT PepperUDPSocketMessageFilter
   void SendSendToError(const ppapi::host::ReplyMessageContext& context,
                        int32_t result);
 
+  int32_t CanUseMulticastAPI(const PP_NetAddress_Private& addr);
+
   // Bitwise-or of SocketOption flags. This stores the state about whether
   // each option is set before Bind() is called.
   int socket_options_;
@@ -133,6 +141,10 @@ class CONTENT_EXPORT PepperUDPSocketMessageFilter
   int32_t rcvbuf_size_;
   int32_t sndbuf_size_;
 
+  // Multicast options, if socket hasn't been bound
+  int multicast_ttl_;
+  int32_t can_use_multicast_;
+
   scoped_ptr<net::UDPSocket> socket_;
   bool closed_;