Bug 1548197 - Remove unused mut instances to fix warnings with rust nightly. r=kvark

Differential Revision: https://phabricator.services.mozilla.com/D29492

--HG--
extra : moz-landing-system : lando

gfx/wr/webrender/src/display_list_flattener.rs

@@ -940,7 +940,7 @@ impl<'a> DisplayListFlattener<'a> {
     ) -> Option<BuiltDisplayListIter<'a>> {
         match *item.item() {
             DisplayItem::Image(ref info) => {
-                let (mut layout, clip_and_scroll) = self.process_common_properties_with_bounds(
+                let (layout, clip_and_scroll) = self.process_common_properties_with_bounds(
                     &info.common,
                     &info.bounds,
                     apply_pipeline_clip,
@@ -959,7 +959,7 @@ impl<'a> DisplayListFlattener<'a> {
                 );
             }
             DisplayItem::YuvImage(ref info) => {
-                let (mut layout, clip_and_scroll) = self.process_common_properties_with_bounds(
+                let (layout, clip_and_scroll) = self.process_common_properties_with_bounds(
                     &info.common,
                     &info.bounds,
                     apply_pipeline_clip,
@@ -975,7 +975,7 @@ impl<'a> DisplayListFlattener<'a> {
                 );
             }
             DisplayItem::Text(ref info) => {
-                let (mut layout, clip_and_scroll) = self.process_common_properties_with_bounds(
+                let (layout, clip_and_scroll) = self.process_common_properties_with_bounds(
                     &info.common,
                     &info.bounds,
                     apply_pipeline_clip,
@@ -1027,7 +1027,7 @@ impl<'a> DisplayListFlattener<'a> {
                 );
             }
             DisplayItem::Line(ref info) => {
-                let (mut layout, clip_and_scroll) = self.process_common_properties_with_bounds(
+                let (layout, clip_and_scroll) = self.process_common_properties_with_bounds(
                     &info.common,
                     &info.area,
                     apply_pipeline_clip,
@@ -1043,7 +1043,7 @@ impl<'a> DisplayListFlattener<'a> {
                 );
             }
             DisplayItem::Gradient(ref info) => {
-                let (mut layout, clip_and_scroll) = self.process_common_properties_with_bounds(
+                let (layout, clip_and_scroll) = self.process_common_properties_with_bounds(
                     &info.common,
                     &info.bounds,
                     apply_pipeline_clip,
@@ -1069,7 +1069,7 @@ impl<'a> DisplayListFlattener<'a> {
                 }
             }
             DisplayItem::RadialGradient(ref info) => {
-                let (mut layout, clip_and_scroll) = self.process_common_properties_with_bounds(
+                let (layout, clip_and_scroll) = self.process_common_properties_with_bounds(
                     &info.common,
                     &info.bounds,
                     apply_pipeline_clip,
@@ -1097,7 +1097,7 @@ impl<'a> DisplayListFlattener<'a> {
                 );
             }
             DisplayItem::BoxShadow(ref info) => {
-                let (mut layout, clip_and_scroll) = self.process_common_properties_with_bounds(
+                let (layout, clip_and_scroll) = self.process_common_properties_with_bounds(
                     &info.common,
                     &info.box_bounds,
                     apply_pipeline_clip,
@@ -1115,7 +1115,7 @@ impl<'a> DisplayListFlattener<'a> {
                 );
             }
             DisplayItem::Border(ref info) => {
-                let (mut layout, clip_and_scroll) = self.process_common_properties_with_bounds(
+                let (layout, clip_and_scroll) = self.process_common_properties_with_bounds(
                     &info.common,
                     &info.bounds,
                     apply_pipeline_clip,

gfx/wr/webrender/src/render_backend.rs

@@ -875,7 +875,7 @@ impl RenderBackend {
 
                                 doc.removed_pipelines.append(&mut txn.removed_pipelines);
 
-                                if let Some(mut built_scene) = txn.built_scene.take() {
+                                if let Some(built_scene) = txn.built_scene.take() {
                                     doc.new_async_scene_ready(
                                         built_scene,
                                         &mut self.recycler,

gfx/wr/wrench/src/main.rs

@@ -444,7 +444,7 @@ fn main() {
     let zoom_factor = args.value_of("zoom").map(|z| z.parse::<f32>().unwrap());
     let chase_primitive = match args.value_of("chase") {
         Some(s) => {
-            let mut items = s
+            let items = s
                 .split(',')
                 .map(|s| s.parse::<f32>().unwrap())
                 .collect::<Vec<_>>();