script: Move WebRTC DOM interfaces to script/dom/webrtc/ (#39023)

Move interfaces defined by the WebRTC specification to the
`script/dom/webrtc/` module from `script/dom/`.

`script/dom/rtc*.rs -> script/dom/webrtc/`

Testing: No changes, just a refactoring

Fixes (partially): #38901

Signed-off-by: Andrei Volykhin <volykhin.andrei@huawei.com>
Co-authored-by: Andrei Volykhin <volykhin.andrei@huawei.com>

components/script/dom/webrtc/rtcrtptransceiver.rs

@@ -0,0 +1,67 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use std::cell::Cell;
+
+use dom_struct::dom_struct;
+
+use crate::dom::bindings::codegen::Bindings::RTCRtpTransceiverBinding::{
+    RTCRtpTransceiverDirection, RTCRtpTransceiverMethods,
+};
+use crate::dom::bindings::reflector::{Reflector, reflect_dom_object};
+use crate::dom::bindings::root::{Dom, DomRoot};
+use crate::dom::globalscope::GlobalScope;
+use crate::dom::rtcrtpsender::RTCRtpSender;
+use crate::script_runtime::CanGc;
+
+#[dom_struct]
+pub(crate) struct RTCRtpTransceiver {
+    reflector_: Reflector,
+    sender: Dom<RTCRtpSender>,
+    direction: Cell<RTCRtpTransceiverDirection>,
+}
+
+impl RTCRtpTransceiver {
+    fn new_inherited(
+        global: &GlobalScope,
+        direction: RTCRtpTransceiverDirection,
+        can_gc: CanGc,
+    ) -> Self {
+        let sender = RTCRtpSender::new(global, can_gc);
+        Self {
+            reflector_: Reflector::new(),
+            direction: Cell::new(direction),
+            sender: Dom::from_ref(&*sender),
+        }
+    }
+
+    pub(crate) fn new(
+        global: &GlobalScope,
+        direction: RTCRtpTransceiverDirection,
+        can_gc: CanGc,
+    ) -> DomRoot<Self> {
+        reflect_dom_object(
+            Box::new(Self::new_inherited(global, direction, can_gc)),
+            global,
+            can_gc,
+        )
+    }
+}
+
+impl RTCRtpTransceiverMethods<crate::DomTypeHolder> for RTCRtpTransceiver {
+    /// <https://w3c.github.io/webrtc-pc/#dom-rtcrtptransceiver-direction>
+    fn Direction(&self) -> RTCRtpTransceiverDirection {
+        self.direction.get()
+    }
+
+    /// <https://w3c.github.io/webrtc-pc/#dom-rtcrtptransceiver-direction>
+    fn SetDirection(&self, direction: RTCRtpTransceiverDirection) {
+        self.direction.set(direction);
+    }
+
+    /// <https://w3c.github.io/webrtc-pc/#dom-rtcrtptransceiver-sender>
+    fn Sender(&self) -> DomRoot<RTCRtpSender> {
+        DomRoot::from_ref(&*self.sender)
+    }
+}