Add viaduct-hyper to the iOS megazord

The goal is to move iOS to viaduct-hyper, which implements the new
viaduct backend.

This is the step 1.  Next up is switching firefox-ios to initializing
`hyper` rather than `reqwest`.  The last step is removing
`viaduct-reqwest` from the megazord.

Author: bendk

Cargo.lock

@@ -30,8 +30,11 @@ struct HyperBackend {
 }
 
 /// Set the viaduct backend to the `hyper`-based one with HTTPS support.
+///
+/// Named `viaduct_init_backend_hyper` since that reads better on iOS/Swift where there aren't any
+/// namespaces.  Once we move to UniFII 0.31 we can use the renaming feature to do this instead.
 #[uniffi::export]
-pub fn init_backend_hyper() -> Result<()> {
+pub fn viaduct_init_backend_hyper() -> Result<()> {
     info!("initializing hyper backend");
     // Create a multi-threaded runtime, with 1 worker thread.
     //

components/support/viaduct-hyper/src/lib.rs

@@ -0,0 +1,3 @@
+[bindings.swift]
+ffi_module_name = "MozillaRustComponents"
+ffi_module_filename = "viaducthyperFFI"

components/support/viaduct-hyper/uniffi.toml

@@ -11,6 +11,7 @@ crate-type = ["staticlib", "rlib"]
 [dependencies]
 rust-log-forwarder = { path = "../../components/support/rust-log-forwarder" }
 viaduct = { path = "../../components/viaduct", features = ["ohttp"] }
+viaduct-hyper = { path = "../../components/support/viaduct-hyper" }
 viaduct-reqwest = { path = "../../components/support/viaduct-reqwest" }
 nimbus-sdk = { path = "../../components/nimbus" }
 crashtest = { path = "../../components/crashtest" }

megazords/ios-rust/Cargo.toml

@@ -11,6 +11,7 @@ crate-type = ["staticlib"]
 [dependencies]
 rust-log-forwarder = { path = "../../../components/support/rust-log-forwarder" }
 viaduct = { path = "../../../components/viaduct" }
+viaduct-hyper = { path = "../../../components/support/viaduct-hyper" }
 viaduct-reqwest = { path = "../../../components/support/viaduct-reqwest" }
 nimbus-sdk = { path = "../../../components/nimbus" }
 error-support = { path = "../../../components/support/error" }

megazords/ios-rust/focus/Cargo.toml

@@ -28,4 +28,5 @@ pub use sync_manager;
 pub use tabs;
 pub use tracing_support;
 pub use viaduct;
+pub use viaduct_hyper;
 pub use viaduct_reqwest;