Auto merge of #17074 - paulrouget:remove_viewport, r=emilio

remove no-op viewport code

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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #16809 (github issue number if applicable).

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- [ ] There are tests for these changes OR
- [x] These changes do not require tests because no-op code

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components/compositing/compositor.rs

@@ -120,9 +120,6 @@ pub struct IOCompositor<Window: WindowMethods> {
     /// The position and size of the window within the rendering area.
     window_rect: TypedRect<u32, DevicePixel>,
 
-    /// The overridden viewport.
-    viewport: Option<(TypedPoint2D<u32, DevicePixel>, TypedSize2D<u32, DevicePixel>)>,
-
     /// "Mobile-style" zoom that does not reflow the page.
     viewport_zoom: PinchZoomFactor,
 
@@ -373,7 +370,6 @@ impl<Window: WindowMethods> IOCompositor<Window> {
             frame_size: frame_size,
             window_rect: window_rect,
             scale: ScaleFactor::new(1.0),
-            viewport: None,
             scale_factor: scale_factor,
             channel_to_self: state.sender.clone_compositor_proxy(),
             delayed_composition_timer: DelayedCompositionTimerProxy::new(state.sender),
@@ -798,10 +794,6 @@ impl<Window: WindowMethods> IOCompositor<Window> {
                 self.initialize_compositing();
             }
 
-            WindowEvent::Viewport(point, size) => {
-              self.viewport = Some((point, size));
-            }
-
             WindowEvent::Resize(size) => {
                 self.on_resize_window_event(size);
             }

components/compositing/windowing.rs

@@ -54,8 +54,6 @@ pub enum WindowEvent {
     Resize(TypedSize2D<u32, DevicePixel>),
     /// Touchpad Pressure
     TouchpadPressure(TypedPoint2D<f32, DevicePixel>, f32, TouchpadPressurePhase),
-    /// Sent when you want to override the viewport.
-    Viewport(TypedPoint2D<u32, DevicePixel>, TypedSize2D<u32, DevicePixel>),
     /// Sent when a new URL is to be loaded.
     LoadUrl(String),
     /// Sent when a mouse hit test is to be performed.
@@ -91,7 +89,6 @@ impl Debug for WindowEvent {
             WindowEvent::InitializeCompositing => write!(f, "InitializeCompositing"),
             WindowEvent::Resize(..) => write!(f, "Resize"),
             WindowEvent::TouchpadPressure(..) => write!(f, "TouchpadPressure"),
-            WindowEvent::Viewport(..) => write!(f, "Viewport"),
             WindowEvent::KeyEvent(..) => write!(f, "Key"),
             WindowEvent::LoadUrl(..) => write!(f, "LoadUrl"),
             WindowEvent::MouseWindowEventClass(..) => write!(f, "Mouse"),