Auto merge of #12178 - frewsxcv:prefs, r=emilio

Refactor `util::prefs` operations to be methods on static struct.

<!-- Please describe your changes on the following line: -->

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [ ] These changes fix #__ (github issue number if applicable).

<!-- Either: -->
- [ ] There are tests for these changes OR
- [X] These changes do not require tests because _____

<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="35" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/12178)
<!-- Reviewable:end -->

1 files changed, 2 insertions, 2 deletions

diff --git a/components/net/http_loader.rs b/components/net/http_loader.rs
index 593ae3e1ead..108cc9b4da1 100644
--- a/components/net/http_loader.rs
+++ b/components/net/http_loader.rs
@@ -51,7 +51,7 @@ use time::Tm;
 #[cfg(any(target_os = "macos", target_os = "linux"))]
 use tinyfiledialogs;
 use url::{Url, Position};
-use util::prefs;
+use util::prefs::PREFS;
 use util::thread::spawn_named;
 use uuid;
 
@@ -860,7 +860,7 @@ pub fn load<A, B>(load_data: &LoadData,
                   user_agent: String,
                   cancel_listener: &CancellationListener)
                   -> Result<StreamedResponse, LoadError> where A: HttpRequest + 'static, B: UIProvider {
-    let max_redirects = prefs::get_pref("network.http.redirection-limit").as_i64().unwrap() as u32;
+    let max_redirects = PREFS.get("network.http.redirection-limit").as_i64().unwrap() as u32;
     let mut iters = 0;
     // URL of the document being loaded, as seen by all the higher-level code.
     let mut doc_url = load_data.url.clone();