Add PPAPI decryptor interfaces.

ppapi/proxy/ppb_instance_proxy.cc

Index: ppapi/proxy/ppb_instance_proxy.cc
diff --git a/ppapi/proxy/ppb_instance_proxy.cc b/ppapi/proxy/ppb_instance_proxy.cc
index ea974ef29db254c7426ca35a6f99d264e49bf7f0..d7d8d20612640a0d53660de85a04a3fe83e41499 100644
--- a/ppapi/proxy/ppb_instance_proxy.cc
+++ b/ppapi/proxy/ppb_instance_proxy.cc
@@ -530,6 +530,47 @@ void PPB_Instance_Proxy::OnHostMsgGetOwnerElementObject(
   }
 }
 
+void PPB_Instance_Proxy::NeedKey(PP_Instance instance,
+                                 PP_Var key_system,
+                                 PP_Var session_id,
+                                 PP_Resource init_data) {
+}
+
+void PPB_Instance_Proxy::KeyAdded(PP_Instance instance,
+                                  PP_Var key_system,
+                                  PP_Var session_id) {
+}
+
+void PPB_Instance_Proxy::KeyMessage(PP_Instance instance,
+                                    PP_Var key_system,
+                                    PP_Var session_id,
+                                    PP_Resource message,
+                                    PP_Var default_url) {
+}
+
+void PPB_Instance_Proxy::KeyError(PP_Instance instance,
+                                  PP_Var key_system,
+                                  PP_Var session_id,
+                                  uint16_t media_error,
+                                  uint16_t system_error) {
+}
+
+void PPB_Instance_Proxy::DeliverBlock(PP_Instance instance,
+                                      PP_Resource decrypted_block,
+                                      PP_CompletionCallback callback) {
+}
+
+void PPB_Instance_Proxy::DeliverFrame(PP_Instance instance,
+                                      PP_Resource decrypted_frame,
+                                      PP_CompletionCallback callback) {
+}
+
+void PPB_Instance_Proxy::DeliverSamples(PP_Instance instance,
+                                        PP_Resource decrypted_samples,
+                                        PP_CompletionCallback callback) {
+}
+
+
 void PPB_Instance_Proxy::OnHostMsgBindGraphics(PP_Instance instance,
                                                const HostResource& device,
                                                PP_Bool* result) {