diff --git a/components/layout/block.rs b/components/layout/block.rs
index abaa80a06ab1..36cdc1ab9887 100644
--- a/components/layout/block.rs
+++ b/components/layout/block.rs
@@ -72,9 +72,6 @@ pub struct FloatedBlockInfo {
     /// box).
     pub float_ceiling: Au,
 
-    /// Index into the fragment list for inline floats
-    pub index: Option<uint>,
-
     /// Left or right?
     pub float_kind: FloatKind,
 }
@@ -84,7 +81,6 @@ impl FloatedBlockInfo {
         FloatedBlockInfo {
             containing_inline_size: Au(0),
             float_ceiling: Au(0),
-            index: None,
             float_kind: float_kind,
         }
     }
diff --git a/components/layout/construct.rs b/components/layout/construct.rs
index 675f49a2be84..ec40dad1199c 100644
--- a/components/layout/construct.rs
+++ b/components/layout/construct.rs
@@ -88,7 +88,7 @@ impl ConstructionResult {
         (*self).clone()
     }
 
-    pub fn debug_id(&self) -> uint {
+    pub fn debug_id(&self) -> usize {
         match self {
             &ConstructionResult::None => 0u,
             &ConstructionResult::ConstructionItem(_) => 0u,
diff --git a/components/layout/context.rs b/components/layout/context.rs
index 6c87ef637425..abb510df0d2a 100644
--- a/components/layout/context.rs
+++ b/components/layout/context.rs
@@ -86,7 +86,7 @@ pub struct SharedLayoutContext {
 
     /// Starts at zero, and increased by one every time a layout completes.
     /// This can be used to easily check for invalid stale data.
-    pub generation: uint,
+    pub generation: u32,
 }
 
 pub struct SharedLayoutContextWrapper(pub *const SharedLayoutContext);
diff --git a/components/layout/flow.rs b/components/layout/flow.rs
index 2840f0714111..976ddbc405b9 100644
--- a/components/layout/flow.rs
+++ b/components/layout/flow.rs
@@ -991,9 +991,9 @@ impl BaseFlow {
         &self.weak_ref_count
     }
 
-    pub fn debug_id(&self) -> uint {
+    pub fn debug_id(&self) -> usize {
         let p = self as *const _;
-        p as uint
+        p as usize
     }
 
     /// Ensures that all display list items generated by this flow are within the flow's overflow
diff --git a/components/layout/layout_task.rs b/components/layout/layout_task.rs
index 3a5110339342..ffaf9c5edcbb 100644
--- a/components/layout/layout_task.rs
+++ b/components/layout/layout_task.rs
@@ -107,7 +107,7 @@ pub struct LayoutTaskData {
 
     /// Starts at zero, and increased by one every time a layout completes.
     /// This can be used to easily check for invalid stale data.
-    pub generation: uint,
+    pub generation: u32,
 
     /// A queued response for the union of the content boxes of a node.
     pub content_box_response: Rect<Au>,
diff --git a/components/layout/traversal.rs b/components/layout/traversal.rs
index a206bf75b4a0..4474cc684a67 100644
--- a/components/layout/traversal.rs
+++ b/components/layout/traversal.rs
@@ -28,7 +28,7 @@ use std::mem;
 
 /// Every time we do another layout, the old bloom filters are invalid. This is
 /// detected by ticking a generation number every layout.
-type Generation = uint;
+type Generation = u32;
 
 /// A pair of the bloom filter used for css selector matching, and the node to
 /// which it applies. This is used to efficiently do `Descendant` selector
diff --git a/components/layout/wrapper.rs b/components/layout/wrapper.rs
index 101249b4747a..01128cd808b9 100644
--- a/components/layout/wrapper.rs
+++ b/components/layout/wrapper.rs
@@ -248,7 +248,7 @@ impl<'ln> LayoutNode<'ln> {
         self.dump_indent(0);
     }
 
-    fn dump_indent(self, indent: uint) {
+    fn dump_indent(self, indent: u32) {
         let mut s = String::new();
         for _ in range(0, indent) {
             s.push_str("  ");
@@ -267,10 +267,10 @@ impl<'ln> LayoutNode<'ln> {
                 self.type_id(), self.has_changed(), self.is_dirty(), self.has_dirty_descendants())
     }
 
-    pub fn flow_debug_id(self) -> uint {
+    pub fn flow_debug_id(self) -> usize {
         let layout_data_ref = self.borrow_layout_data();
         match *layout_data_ref {
-            None              => 0u,
+            None => 0,
             Some(ref layout_data) => layout_data.data.flow_construction_result.debug_id()
         }
     }
@@ -806,7 +806,7 @@ impl<'ln> ThreadSafeLayoutNode<'ln> {
         self.node.debug_id()
     }
 
-    pub fn flow_debug_id(self) -> uint {
+    pub fn flow_debug_id(self) -> usize {
         self.node.flow_debug_id()
     }
 
@@ -1135,11 +1135,11 @@ pub trait PostorderNodeMutTraversal {
 
 /// Opaque type stored in type-unsafe work queues for parallel layout.
 /// Must be transmutable to and from LayoutNode/ThreadSafeLayoutNode.
-pub type UnsafeLayoutNode = (uint, uint);
+pub type UnsafeLayoutNode = (usize, usize);
 
 pub fn layout_node_to_unsafe_layout_node(node: &LayoutNode) -> UnsafeLayoutNode {
     unsafe {
-        let ptr: uint = mem::transmute_copy(node);
+        let ptr: usize = mem::transmute_copy(node);
         (ptr, 0)
     }
 }