Revert "Backport several style changes from Gecko (5) (#30099)" (#30104)

This reverts commit 8e15389cae.

components/style/gecko/media_queries.rs

@@ -17,7 +17,6 @@ use crate::values::computed::font::GenericFontFamily;
 use crate::values::computed::{ColorScheme, Length};
 use crate::values::specified::color::SystemColor;
 use crate::values::specified::font::FONT_MEDIUM_PX;
-use crate::values::specified::ViewportVariant;
 use crate::values::{CustomIdent, KeyframesName};
 use app_units::{Au, AU_PER_PX};
 use cssparser::RGBA;
@@ -59,9 +58,6 @@ pub struct Device {
     /// Whether any styles computed in the document relied on the viewport size
     /// by using vw/vh/vmin/vmax units.
     used_viewport_size: AtomicBool,
-    /// Whether any styles computed in the document relied on the viewport size
-    /// by using dvw/dvh/dvmin/dvmax units.
-    used_dynamic_viewport_size: AtomicBool,
     /// The CssEnvironment object responsible of getting CSS environment
     /// variables.
     environment: CssEnvironment,
@@ -104,7 +100,6 @@ impl Device {
             used_root_font_size: AtomicBool::new(false),
             used_font_metrics: AtomicBool::new(false),
             used_viewport_size: AtomicBool::new(false),
-            used_dynamic_viewport_size: AtomicBool::new(false),
             environment: CssEnvironment,
         }
     }
@@ -272,8 +267,6 @@ impl Device {
         self.used_root_font_size.store(false, Ordering::Relaxed);
         self.used_font_metrics.store(false, Ordering::Relaxed);
         self.used_viewport_size.store(false, Ordering::Relaxed);
-        self.used_dynamic_viewport_size
-            .store(false, Ordering::Relaxed);
     }
 
     /// Returns whether we ever looked up the root font size of the Device.
@@ -344,10 +337,7 @@ impl Device {
 
     /// Returns the current viewport size in app units, recording that it's been
     /// used for viewport unit resolution.
-    pub fn au_viewport_size_for_viewport_unit_resolution(
-        &self,
-        variant: ViewportVariant,
-    ) -> Size2D<Au> {
+    pub fn au_viewport_size_for_viewport_unit_resolution(&self) -> Size2D<Au> {
         self.used_viewport_size.store(true, Ordering::Relaxed);
         let pc = match self.pres_context() {
             Some(pc) => pc,
@@ -358,42 +348,8 @@ impl Device {
             return self.page_size_minus_default_margin(pc);
         }
 
-        match variant {
-            ViewportVariant::UADefault => {
-                let size = &pc.mSizeForViewportUnits;
-                Size2D::new(Au(size.width), Au(size.height))
-            },
-            ViewportVariant::Small => {
-                let size = &pc.mVisibleArea;
-                Size2D::new(Au(size.width), Au(size.height))
-            },
-            ViewportVariant::Large => {
-                let size = &pc.mVisibleArea;
-                // Looks like IntCoordTyped is treated as if it's u32 in Rust.
-                debug_assert!(
-                    /* pc.mDynamicToolbarMaxHeight >=0 && */
-                    pc.mDynamicToolbarMaxHeight < i32::MAX as u32
-                );
-                Size2D::new(
-                    Au(size.width),
-                    Au(size.height
-                        + pc.mDynamicToolbarMaxHeight as i32 * pc.mCurAppUnitsPerDevPixel),
-                )
-            },
-            ViewportVariant::Dynamic => {
-                self.used_dynamic_viewport_size.store(true, Ordering::Relaxed);
-                let size = &pc.mVisibleArea;
-                // Looks like IntCoordTyped is treated as if it's u32 in Rust.
-                debug_assert!(
-                    /* pc.mDynamicToolbarHeight >=0 && */
-                    pc.mDynamicToolbarHeight < i32::MAX as u32
-                );
-                Size2D::new(
-                    Au(size.width),
-                    Au(size.height + pc.mDynamicToolbarHeight as i32 * pc.mCurAppUnitsPerDevPixel),
-                )
-            },
-        }
+        let size = &pc.mSizeForViewportUnits;
+        Size2D::new(Au(size.width), Au(size.height))
     }
 
     /// Returns whether we ever looked up the viewport size of the Device.
@@ -401,21 +357,11 @@ impl Device {
         self.used_viewport_size.load(Ordering::Relaxed)
     }
 
-    /// Returns whether we ever looked up the dynamic viewport size of the Device.
-    pub fn used_dynamic_viewport_size(&self) -> bool {
-        self.used_dynamic_viewport_size.load(Ordering::Relaxed)
-    }
-
     /// Returns whether font metrics have been queried.
     pub fn used_font_metrics(&self) -> bool {
         self.used_font_metrics.load(Ordering::Relaxed)
     }
 
-    /// Returns whether visited styles are enabled.
-    pub fn visited_styles_enabled(&self) -> bool {
-        unsafe { bindings::Gecko_VisitedStylesEnabled(self.document()) }
-    }
-
     /// Returns the device pixel ratio.
     pub fn device_pixel_ratio(&self) -> Scale<f32, CSSPixel, DevicePixel> {
         let pc = match self.pres_context() {