script: Move WebGL DOM interfaces to script/dom/webgl/ (#38995)

Move interfaces defined by the WebGL spec to the `script/dom/webgl/
`module from `script/dom/`.

`script/dom/webgl*.rs` -> `script/dom/webgl/`
`script/dom/webgl_extensions` -> `script/dom/webgl/extensions`
`script/dom/webgl_validations` -> `script/dom/webgl/validations`

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/webgl/webgluniformlocation.rs

@@ -0,0 +1,95 @@
+/* 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/. */
+
+// https://www.khronos.org/registry/webgl/specs/latest/1.0/webgl.idl
+use canvas_traits::webgl::{WebGLContextId, WebGLProgramId};
+use dom_struct::dom_struct;
+
+use crate::dom::bindings::reflector::{Reflector, reflect_dom_object};
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::window::Window;
+use crate::script_runtime::CanGc;
+
+#[dom_struct]
+pub(crate) struct WebGLUniformLocation {
+    reflector_: Reflector,
+    id: i32,
+    #[no_trace]
+    context_id: WebGLContextId,
+    #[no_trace]
+    program_id: WebGLProgramId,
+    link_generation: u64,
+    size: Option<i32>,
+    type_: u32,
+}
+
+impl WebGLUniformLocation {
+    fn new_inherited(
+        id: i32,
+        context_id: WebGLContextId,
+        program_id: WebGLProgramId,
+        link_generation: u64,
+        size: Option<i32>,
+        type_: u32,
+    ) -> Self {
+        Self {
+            reflector_: Reflector::new(),
+            id,
+            context_id,
+            program_id,
+            link_generation,
+            size,
+            type_,
+        }
+    }
+
+    #[allow(clippy::too_many_arguments)]
+    pub(crate) fn new(
+        window: &Window,
+        id: i32,
+        context_id: WebGLContextId,
+        program_id: WebGLProgramId,
+        link_generation: u64,
+        size: Option<i32>,
+        type_: u32,
+        can_gc: CanGc,
+    ) -> DomRoot<Self> {
+        reflect_dom_object(
+            Box::new(Self::new_inherited(
+                id,
+                context_id,
+                program_id,
+                link_generation,
+                size,
+                type_,
+            )),
+            window,
+            can_gc,
+        )
+    }
+
+    pub(crate) fn id(&self) -> i32 {
+        self.id
+    }
+
+    pub(crate) fn program_id(&self) -> WebGLProgramId {
+        self.program_id
+    }
+
+    pub(crate) fn context_id(&self) -> WebGLContextId {
+        self.context_id
+    }
+
+    pub(crate) fn link_generation(&self) -> u64 {
+        self.link_generation
+    }
+
+    pub(crate) fn size(&self) -> Option<i32> {
+        self.size
+    }
+
+    pub(crate) fn type_(&self) -> u32 {
+        self.type_
+    }
+}