Add style_traits crate to improve crate separation,

closes #7353

components/compositing/Cargo.toml

@@ -19,6 +19,9 @@ path = "../layout_traits"
 [dependencies.script_traits]
 path = "../script_traits"
 
+[dependencies.style_traits]
+path = "../style_traits"
+
 [dependencies.msg]
 path = "../msg"
 
@@ -28,9 +31,6 @@ path = "../profile_traits"
 [dependencies.net_traits]
 path = "../net_traits"
 
-[dependencies.style]
-path = "../style"
-
 [dependencies.util]
 path = "../util"
 
@@ -79,4 +79,3 @@ core-graphics = "0.1"
 
 [target.x86_64-apple-darwin.dependencies.core-text]
 git = "https://github.com/servo/core-text-rs"
-

components/compositing/compositor.rs

@@ -46,7 +46,7 @@ use std::mem as std_mem;
 use std::rc::Rc;
 use std::slice::bytes::copy_memory;
 use std::sync::mpsc::Sender;
-use style::viewport::ViewportConstraints;
+use style_traits::viewport::ViewportConstraints;
 use time::{precise_time_ns, precise_time_s};
 use url::Url;
 use util::geometry::{Au, PagePx, ScreenPx, ViewportPx};

components/compositing/compositor_task.rs

@@ -25,7 +25,7 @@ use profile_traits::time;
 use std::fmt::{Error, Formatter, Debug};
 use std::rc::Rc;
 use std::sync::mpsc::{channel, Sender, Receiver};
-use style::viewport::ViewportConstraints;
+use style_traits::viewport::ViewportConstraints;
 use url::Url;
 use util::cursor::Cursor;
 

components/compositing/constellation.rs

@@ -50,7 +50,7 @@ use std::marker::PhantomData;
 use std::mem::replace;
 use std::process;
 use std::sync::mpsc::{Receiver, Sender, channel};
-use style::viewport::ViewportConstraints;
+use style_traits::viewport::ViewportConstraints;
 use url::Url;
 use util::cursor::Cursor;
 use util::geometry::PagePx;

components/compositing/lib.rs

@@ -30,7 +30,7 @@ extern crate num;
 extern crate profile_traits;
 extern crate net_traits;
 extern crate gfx_traits;
-extern crate style;
+extern crate style_traits;
 #[macro_use]
 extern crate util;
 extern crate gleam;
@@ -58,4 +58,3 @@ mod scrolling;
 pub mod pipeline;
 pub mod constellation;
 pub mod windowing;
-