Rename EME WD call parameters

ppapi/proxy/ppb_instance_proxy.h

Index: ppapi/proxy/ppb_instance_proxy.h
diff --git a/ppapi/proxy/ppb_instance_proxy.h b/ppapi/proxy/ppb_instance_proxy.h
index 2b0205199646206820efc203c928dcb59780c57d..12e56b938e5695c2fb265e36797ce10a3590410a 100644
--- a/ppapi/proxy/ppb_instance_proxy.h
+++ b/ppapi/proxy/ppb_instance_proxy.h
@@ -118,18 +118,17 @@ class PPB_Instance_Proxy : public InterfaceProxy,
       PP_Instance instance,
       PP_URLComponents_Dev* components) OVERRIDE;
   virtual void SessionCreated(PP_Instance instance,
-                              uint32_t reference_id,
-                              PP_Var session_id) OVERRIDE;
+                              uint32_t session_id,
+                              PP_Var web_session_id) OVERRIDE;
   virtual void SessionMessage(PP_Instance instance,
-                              uint32_t reference_id,
+                              uint32_t session_id,
                               PP_Var message,
                               PP_Var destination_url) OVERRIDE;
-  virtual void SessionReady(PP_Instance instance,
-                            uint32_t reference_id) OVERRIDE;
+  virtual void SessionReady(PP_Instance instance, uint32_t session_id) OVERRIDE;
   virtual void SessionClosed(PP_Instance instance,
-                             uint32_t reference_id) OVERRIDE;
+                             uint32_t session_id) OVERRIDE;
   virtual void SessionError(PP_Instance instance,
-                            uint32_t reference_id,
+                            uint32_t session_id,
                             int32_t media_error,
                             int32_t system_code) OVERRIDE;
   virtual void DeliverBlock(PP_Instance instance,
@@ -222,20 +221,20 @@ class PPB_Instance_Proxy : public InterfaceProxy,
                                      SerializedVarReturnValue result);
   void OnHostMsgGetPluginReferrerURL(PP_Instance instance,
                                      SerializedVarReturnValue result);
-  virtual void OnHostMsgSessionCreated(PP_Instance instance,
-                                       uint32_t reference_id,
-                                       SerializedVarReceiveInput session_id);
+  virtual void OnHostMsgSessionCreated(
+      PP_Instance instance,
+      uint32_t session_id,
+      SerializedVarReceiveInput web_session_id);
   virtual void OnHostMsgSessionMessage(
       PP_Instance instance,
-      uint32_t reference_id,
+      uint32_t session_id,
       SerializedVarReceiveInput message,
       SerializedVarReceiveInput destination_url);
-  virtual void OnHostMsgSessionReady(PP_Instance instance,
-                                     uint32_t reference_id);
+  virtual void OnHostMsgSessionReady(PP_Instance instance, uint32_t session_id);
   virtual void OnHostMsgSessionClosed(PP_Instance instance,
-                                      uint32_t reference_id);
+                                      uint32_t session_id);
   virtual void OnHostMsgSessionError(PP_Instance instance,
-                                     uint32_t reference_id,
+                                     uint32_t session_id,
                                      int32_t media_error,
                                      int32_t system_code);
   virtual void OnHostMsgDecoderInitializeDone(