Message that can be sent between the UI process and web process extensions.
A WebKitUserMessage is a message that can be used for the communication between the UI process
and web process extensions. A WebKitUserMessage always has a name, and it can also include parameters and
UNIX file descriptors. Messages can be sent from a #WebKitWebContext to all web process extensions,
from a web process extension to its corresponding #WebKitWebContext, and from a #WebKitWebView to its
corresponding #WebKitWebPage (and vice versa). One to one messages can be replied to directly with
webkitwebprocessextension.user_message.UserMessage.sendReply.
Message that can be sent between the UI process and web process extensions.
A WebKitUserMessage is a message that can be used for the communication between the UI process and web process extensions. A WebKitUserMessage always has a name, and it can also include parameters and UNIX file descriptors. Messages can be sent from a #WebKitWebContext to all web process extensions, from a web process extension to its corresponding #WebKitWebContext, and from a #WebKitWebView to its corresponding #WebKitWebPage (and vice versa). One to one messages can be replied to directly with webkitwebprocessextension.user_message.UserMessage.sendReply.