Add Servo page zoom support

crates/ely_servo_host/src/lib.rs

@@ -10,10 +10,12 @@ mod runtime_input;
 mod runtime_permissions;
 #[cfg(feature = "servo-engine")]
 mod runtime_waker;
+#[cfg(feature = "servo-engine")]
+mod runtime_webview;
 
 pub use error::ServoHostError;
 pub use host::{
-    KeyboardTextRequest, MouseClickRequest, MouseDragRequest, NavigationRequest,
+    KeyboardTextRequest, MouseClickRequest, MouseDragRequest, NavigationRequest, PageZoomRequest,
     PermissionDecision, PermissionRequest, RenderedFrame, RenderedFrameSummary, ResizeRequest,
     ScreenshotRequest, ScrollRequest, ServoHost, TouchTapRequest, WebViewSnapshot, WebViewState,
 };