Dont use lazy static to construct mutexes (#33047)

* Remove usage of lazy-static in background_hang_monitor

The lazy-static crate was only used to construct a mutex,
but since Mutex::new is const this can be done at compiletime
instead.

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Remove usage of lazy-static in servoshell

Lazy-static was only used to construct a mutex, but
since Mutex::new is const this can simply be done at
compiletime.

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

---------

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

Cargo.lock

@@ -291,7 +291,6 @@ dependencies = [
  "base",
  "crossbeam-channel",
  "ipc-channel",
- "lazy_static",
  "libc",
  "log",
  "mach2",
@@ -6187,7 +6186,6 @@ dependencies = [
  "ipc-channel",
  "jni",
  "keyboard-types",
- "lazy_static",
  "libc",
  "libloading",
  "libservo",

components/background_hang_monitor/Cargo.toml

@@ -22,9 +22,6 @@ libc = { workspace = true }
 log = { workspace = true }
 serde_json = { workspace = true }
 
-[dev-dependencies]
-lazy_static = { workspace = true }
-
 [target.'cfg(target_os = "macos")'.dependencies]
 mach2 = "0.4"
 

components/background_hang_monitor/tests/hang_monitor_tests.rs

@@ -17,9 +17,7 @@ use background_hang_monitor_api::{
 use base::id::TEST_PIPELINE_ID;
 use ipc_channel::ipc;
 
-lazy_static::lazy_static! {
-    static ref SERIAL: Mutex<()> = Mutex::new(());
-}
+static SERIAL: Mutex<()> = Mutex::new(());
 
 #[test]
 fn test_hang_monitoring() {

ports/servoshell/Cargo.toml

@@ -56,7 +56,6 @@ libc = { workspace = true }
 libservo = { path = "../../components/servo" }
 cfg-if = { workspace = true }
 log = { workspace = true }
-lazy_static = { workspace = true }
 getopts = { workspace = true }
 url = { workspace = true }
 servo-media = { workspace = true }

ports/servoshell/resources.rs

@@ -9,9 +9,7 @@ use std::{env, fs};
 use cfg_if::cfg_if;
 use servo::embedder_traits::resources::{self, Resource};
 
-lazy_static::lazy_static! {
-    static ref CMD_RESOURCE_DIR: Mutex<Option<PathBuf>> = Mutex::new(None);
-}
+static CMD_RESOURCE_DIR: Mutex<Option<PathBuf>> = Mutex::new(None);
 
 struct ResourceReader;