Add PPAPI decryptor interfaces.

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 20dd60db5ef762ed05ed1ff5db6a69fc0eda510f..46547a63721dd16dcc786bfc34917dde1066f9cb 100644
--- a/ppapi/proxy/ppb_instance_proxy.h
+++ b/ppapi/proxy/ppb_instance_proxy.h
@@ -101,6 +101,32 @@ class PPB_Instance_Proxy : public InterfaceProxy,
                                      const char* text,
                                      uint32_t caret,
                                      uint32_t anchor) OVERRIDE;
+  virtual void NeedKey(PP_Instance instance,
+                       PP_Var key_system,
+                       PP_Var session_id,
+                       PP_Resource init_data) OVERRIDE;
+  virtual void KeyAdded(PP_Instance instance,
+                        PP_Var key_system,
+                        PP_Var session_id) OVERRIDE;
+  virtual void KeyMessage(PP_Instance instance,
+                          PP_Var key_system,
+                          PP_Var session_id,
+                          PP_Resource message,
+                          PP_Var default_url) OVERRIDE;
+  virtual void KeyError(PP_Instance instance,
+                        PP_Var key_system,
+                        PP_Var session_id,
+                        uint16_t media_error,
+                        uint16_t system_error) OVERRIDE;
+  virtual void DeliverBlock(PP_Instance instance,
+                            PP_Resource decrypted_block,
+                            PP_CompletionCallback callback) OVERRIDE;
+  virtual void DeliverFrame(PP_Instance instance,
+                            PP_Resource decrypted_frame,
+                            PP_CompletionCallback callback) OVERRIDE;
+  virtual void DeliverSamples(PP_Instance instance,
+                              PP_Resource decrypted_samples,
+                              PP_CompletionCallback callback) OVERRIDE;
 
 #if !defined(OS_NACL)
   virtual PP_Var ResolveRelativeToDocument(