Move webdriver actions commands to servoshell (#37669)

Move webdriver actions commands to servoshell.

Testing: Test with webdriver enable in the CI
[Test result
1](https://github.com/longvatrong111/servo/actions/runs/15875355256)
[Test result
2](https://github.com/longvatrong111/servo/actions/runs/15875356595)
[Test result
3](https://github.com/longvatrong111/servo/actions/runs/15875361886)

Fixes: https://github.com/servo/servo/issues/37370

Signed-off-by: batu_hoang <longvatrong111@gmail.com>

components/shared/compositing/lib.rs

@@ -8,10 +8,7 @@ use std::fmt::{Debug, Error, Formatter};
 
 use base::id::{PipelineId, WebViewId};
 use crossbeam_channel::Sender;
-use embedder_traits::{
-    AnimationState, EventLoopWaker, MouseButton, MouseButtonAction, TouchEventResult,
-    WebDriverMessageId,
-};
+use embedder_traits::{AnimationState, EventLoopWaker, TouchEventResult};
 use euclid::Rect;
 use ipc_channel::ipc::IpcSender;
 use log::warn;
@@ -105,20 +102,6 @@ pub enum CompositorMsg {
     PipelineExited(WebViewId, PipelineId, PipelineExitSource),
     /// The load of a page has completed
     LoadComplete(WebViewId),
-    /// WebDriver mouse button event
-    WebDriverMouseButtonEvent(
-        WebViewId,
-        MouseButtonAction,
-        MouseButton,
-        f32,
-        f32,
-        Option<WebDriverMessageId>,
-    ),
-    /// WebDriver mouse move event
-    WebDriverMouseMoveEvent(WebViewId, f32, f32, Option<WebDriverMessageId>),
-    // Webdriver wheel scroll event
-    WebDriverWheelScrollEvent(WebViewId, f32, f32, f64, f64, Option<WebDriverMessageId>),
-
     /// Inform WebRender of the existence of this pipeline.
     SendInitialTransaction(WebRenderPipelineId),
     /// Perform a scroll operation.

components/shared/constellation/lib.rs

@@ -20,7 +20,7 @@ use base::cross_process_instant::CrossProcessInstant;
 use base::id::{MessagePortId, PipelineId, WebViewId};
 use embedder_traits::{
     CompositorHitTestResult, Cursor, InputEvent, JavaScriptEvaluationId, MediaSessionActionType,
-    Theme, ViewportDetails, WebDriverCommandMsg,
+    Theme, ViewportDetails, WebDriverCommandMsg, WebDriverCommandResponse,
 };
 pub use from_script_message::*;
 use ipc_channel::ipc::IpcSender;
@@ -96,6 +96,8 @@ pub enum EmbedderToConstellationMessage {
     CreateMemoryReport(IpcSender<MemoryReportResult>),
     /// Sends the generated image key to the image cache associated with this pipeline.
     SendImageKeysForPipeline(PipelineId, Vec<ImageKey>),
+    /// Set WebDriver input event handled sender.
+    SetWebDriverResponseSender(IpcSender<WebDriverCommandResponse>),
 }
 
 /// A description of a paint metric that is sent from the Servo renderer to the

components/shared/embedder/webdriver.rs

@@ -30,6 +30,9 @@ pub struct WebDriverMessageId(pub usize);
 /// Messages to the constellation originating from the WebDriver server.
 #[derive(Debug, Deserialize, Serialize)]
 pub enum WebDriverCommandMsg {
+    /// Used in the initialization of the WebDriver server to set the sender for sending responses
+    /// back to the WebDriver client. It is set to constellation for now
+    SetWebDriverResponseSender(IpcSender<WebDriverCommandResponse>),
     /// Get the window size.
     GetWindowRect(WebViewId, IpcSender<DeviceIntRect>),
     /// Get the viewport size.
@@ -53,7 +56,6 @@ pub enum WebDriverCommandMsg {
         KeyboardEvent,
         // Should never be None.
         Option<WebDriverMessageId>,
-        IpcSender<WebDriverCommandResponse>,
     ),
     /// Act as if the mouse was clicked in the browsing context with the given ID.
     MouseButtonAction(
@@ -64,7 +66,6 @@ pub enum WebDriverCommandMsg {
         f32,
         // Should never be None.
         Option<WebDriverMessageId>,
-        IpcSender<WebDriverCommandResponse>,
     ),
     /// Act as if the mouse was moved in the browsing context with the given ID.
     MouseMoveAction(
@@ -74,7 +75,6 @@ pub enum WebDriverCommandMsg {
         // None if it's not the last `perform_pointer_move` since we only
         // expect one response from constellation for each tick actions.
         Option<WebDriverMessageId>,
-        IpcSender<WebDriverCommandResponse>,
     ),
     /// Act as if the mouse wheel is scrolled in the browsing context given the given ID.
     WheelScrollAction(
@@ -86,7 +86,6 @@ pub enum WebDriverCommandMsg {
         // None if it's not the last `perform_wheel_scroll` since we only
         // expect one response from constellation for each tick actions.
         Option<WebDriverMessageId>,
-        IpcSender<WebDriverCommandResponse>,
     ),
     /// Set the window size.
     SetWindowSize(