diff --git a/components/layout_thread/lib.rs b/components/layout_thread/lib.rs
index c196f394d51..c144f0f526c 100644
--- a/components/layout_thread/lib.rs
+++ b/components/layout_thread/lib.rs
@@ -496,7 +496,6 @@ impl LayoutThread {
     // Create a layout context for use in building display lists, hit testing, &c.
     fn build_layout_context(&self,
                             rw_data: &LayoutThreadData,
-                            screen_size_changed: bool,
                             goal: ReflowGoal,
                             request_images: bool)
                             -> LayoutContext {
@@ -506,7 +505,6 @@ impl LayoutThread {
         LayoutContext {
             style_context: SharedStyleContext {
                 viewport_size: self.viewport_size.clone(),
-                screen_size_changed: screen_size_changed,
                 stylist: rw_data.stylist.clone(),
                 goal: goal,
                 running_animations: self.running_animations.clone(),
@@ -1120,7 +1118,6 @@ impl LayoutThread {
 
         // Create a layout context for use throughout the following passes.
         let mut layout_context = self.build_layout_context(&*rw_data,
-                                                           viewport_size_changed,
                                                            data.reflow_info.goal,
                                                            true);
 
@@ -1351,7 +1348,6 @@ impl LayoutThread {
         };
 
         let mut layout_context = self.build_layout_context(&*rw_data,
-                                                           false,
                                                            reflow_info.goal,
                                                            false);
 
@@ -1387,7 +1383,6 @@ impl LayoutThread {
         };
 
         let mut layout_context = self.build_layout_context(&*rw_data,
-                                                           false,
                                                            reflow_info.goal,
                                                            false);
 
diff --git a/components/style/context.rs b/components/style/context.rs
index bbf3a7ed61c..c97e6f531f9 100644
--- a/components/style/context.rs
+++ b/components/style/context.rs
@@ -64,9 +64,6 @@ pub struct SharedStyleContext {
     /// The current viewport size.
     pub viewport_size: Size2D<Au>,
 
-    /// Screen sized changed?
-    pub screen_size_changed: bool,
-
     /// The CSS selector stylist.
     pub stylist: Arc<Stylist>,
 
diff --git a/ports/geckolib/glue.rs b/ports/geckolib/glue.rs
index 915b5e1a77b..bf438eff024 100644
--- a/ports/geckolib/glue.rs
+++ b/ports/geckolib/glue.rs
@@ -164,7 +164,6 @@ fn create_shared_context(per_doc_data: &PerDocumentStyleDataImpl) -> SharedStyle
     SharedStyleContext {
         // FIXME (bug 1303229): Use the actual viewport size here
         viewport_size: Size2D::new(Au(0), Au(0)),
-        screen_size_changed: false,
         goal: ReflowGoal::ForScriptQuery,
         stylist: per_doc_data.stylist.clone(),
         running_animations: per_doc_data.running_animations.clone(),