Remove redundant url clones

They are now redundant since now document.url() returns a struct rather
than a reference.

components/script/dom/htmlanchorelement.rs

@@ -615,5 +615,5 @@ fn follow_hyperlink(subject: &Element, hyperlink_suffix: Option<String>, referre
     debug!("following hyperlink to {}", url);
 
     let window = document.window();
-    window.load_url(url, false, referrer_policy);
+    window.load_url(url, false, false, referrer_policy);
 }

components/script/dom/htmlformelement.rs

@@ -341,7 +341,7 @@ impl HTMLFormElement {
         let _target = submitter.target();
         // TODO: Handle browsing contexts, partially loaded documents (step 16-17)
 
-        let mut load_data = LoadData::new(action_components, doc.get_referrer_policy(), Some(doc.url().clone()));
+        let mut load_data = LoadData::new(action_components, doc.get_referrer_policy(), Some(doc.url()));
 
         // Step 18
         match (&*scheme, method) {

components/script/dom/htmliframeelement.rs

@@ -157,7 +157,7 @@ impl HTMLIFrameElement {
 
         let document = document_from_node(self);
         self.navigate_or_reload_child_browsing_context(
-            Some(LoadData::new(url, document.get_referrer_policy(), Some(document.url().clone()))), false);
+            Some(LoadData::new(url, document.get_referrer_policy(), Some(document.url()))), false);
     }
 
     #[allow(unsafe_code)]

components/script/dom/htmllinkelement.rs

@@ -280,9 +280,9 @@ impl HTMLLinkElement {
             destination: Destination::Style,
             credentials_mode: CredentialsMode::Include,
             use_url_credentials: true,
-            origin: document.url().clone(),
+            origin: document.url(),
             pipeline_id: Some(self.global().pipeline_id()),
-            referrer_url: Some(document.url().clone()),
+            referrer_url: Some(document.url()),
             referrer_policy: referrer_policy,
             .. RequestInit::default()
         };

components/script/dom/htmlmediaelement.rs

@@ -548,9 +548,9 @@ impl HTMLMediaElement {
                 destination: Destination::Media,
                 credentials_mode: CredentialsMode::Include,
                 use_url_credentials: true,
-                origin: document.url().clone(),
+                origin: document.url(),
                 pipeline_id: Some(self.global().pipeline_id()),
-                referrer_url: Some(document.url().clone()),
+                referrer_url: Some(document.url()),
                 referrer_policy: document.get_referrer_policy(),
                 .. RequestInit::default()
             };

components/script/dom/htmlscriptelement.rs

@@ -241,9 +241,9 @@ fn fetch_a_classic_script(script: &HTMLScriptElement,
             Some(CorsSettings::Anonymous) => CredentialsMode::CredentialsSameOrigin,
             _ => CredentialsMode::Include,
         },
-        origin: doc.url().clone(),
+        origin: doc.url(),
         pipeline_id: Some(script.global().pipeline_id()),
-        referrer_url: Some(doc.url().clone()),
+        referrer_url: Some(doc.url()),
         referrer_policy: doc.get_referrer_policy(),
         .. RequestInit::default()
     };

components/script/dom/macros.rs

@@ -135,7 +135,7 @@ macro_rules! make_string_or_document_url_getter(
 
             if val.is_empty() {
                 let doc = document_from_node(self);
-                DOMString::from(doc.url().clone().into_string())
+                DOMString::from(doc.url().into_string())
             } else {
                 val
             }

components/script/dom/node.rs

@@ -1751,7 +1751,7 @@ impl Node {
                 let window = document.window();
                 let loader = DocumentLoader::new(&*document.loader());
                 let document = Document::new(window, None,
-                                             Some((*document.url()).clone()),
+                                             Some(document.url()),
                                              is_html_doc, None,
                                              None, DocumentSource::NotFromParser, loader,
                                              None, None);

components/script/dom/window.rs

@@ -1366,7 +1366,7 @@ impl Window {
     }
 
     pub fn get_url(&self) -> ServoUrl {
-        (*self.Document().url()).clone()
+        self.Document().url()
     }
 
     pub fn layout_chan(&self) -> &Sender<Msg> {

components/script/dom/xmlhttprequest.rs

@@ -159,7 +159,7 @@ impl XMLHttpRequest {
         //TODO - update this when referrer policy implemented for workers
         let (referrer_url, referrer_policy) = if let Some(window) = global.downcast::<Window>() {
             let document = window.Document();
-            (Some(document.url().clone()), document.get_referrer_policy())
+            (Some(document.url()), document.get_referrer_policy())
         } else {
             (None, None)
         };