Add script execution support via WebDriver

components/msg/Cargo.toml

@@ -14,6 +14,9 @@ path = "../style"
 [dependencies.util]
 path = "../util"
 
+[dependencies.webdriver_traits]
+path = "../webdriver_traits"
+
 [dependencies.azure]
 git = "https://github.com/servo/rust-azure"
 

components/msg/constellation_msg.rs

@@ -14,6 +14,7 @@ use layers::geometry::DevicePixel;
 use util::cursor::Cursor;
 use util::geometry::{PagePx, ViewportPx};
 use std::sync::mpsc::{channel, Sender, Receiver};
+use webdriver_traits::WebDriverScriptCommand;
 use url::Url;
 
 #[derive(Clone)]
@@ -231,6 +232,8 @@ pub enum Msg {
     FocusMsg(PipelineId),
     /// Requests that the constellation retrieve the current contents of the clipboard
     GetClipboardContents(Sender<String>),
+    // Dispatch a webdriver command
+    WebDriverCommandMsg(PipelineId, WebDriverScriptCommand)
 }
 
 // https://developer.mozilla.org/en-US/docs/Web/API/Using_the_Browser_API#Events

components/msg/lib.rs

@@ -9,6 +9,7 @@ extern crate hyper;
 extern crate layers;
 extern crate util;
 extern crate url;
+extern crate webdriver_traits;
 
 #[cfg(target_os="macos")]
 extern crate core_foundation;