Auto merge of #16819 - canaltinova:quirk-mode, r=bholley,emilio

stylo: Propagate quirks mode information from Gecko to Servo

r=bholley in bugzilla

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix [Bug 1360488](https://bugzilla.mozilla.org/show_bug.cgi?id=1360488)

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components/style/gecko/data.rs

@@ -9,6 +9,7 @@ use atomic_refcell::{AtomicRef, AtomicRefCell, AtomicRefMut};
 use dom::OpaqueNode;
 use gecko_bindings::bindings::RawServoStyleSet;
 use gecko_bindings::structs::RawGeckoPresContextOwned;
+use gecko_bindings::structs::nsIDocument;
 use gecko_bindings::sugar::ownership::{HasBoxFFI, HasFFI, HasSimpleFFI};
 use media_queries::Device;
 use parking_lot::RwLock;
@@ -56,11 +57,14 @@ impl PerDocumentStyleData {
     /// Create a dummy `PerDocumentStyleData`.
     pub fn new(pres_context: RawGeckoPresContextOwned) -> Self {
         let device = Device::new(pres_context);
+        let quirks_mode = unsafe {
+            (*(*device.pres_context).mDocument.raw::<nsIDocument>()).mCompatMode
+        };
 
         let (new_anims_sender, new_anims_receiver) = channel();
 
         PerDocumentStyleData(AtomicRefCell::new(PerDocumentStyleDataImpl {
-            stylist: Stylist::new(device),
+            stylist: Stylist::new(device, quirks_mode.into()),
             stylesheets: StylesheetSet::new(),
             new_animations_sender: new_anims_sender,
             new_animations_receiver: new_anims_receiver,

components/style/gecko/generated/bindings.rs

@@ -53,6 +53,7 @@ use gecko_bindings::structs::nsChangeHint;
 use gecko_bindings::structs::nsCursorImage;
 use gecko_bindings::structs::nsFont;
 use gecko_bindings::structs::nsIAtom;
+use gecko_bindings::structs::nsCompatibility;
 use gecko_bindings::structs::nsMediaFeature;
 use gecko_bindings::structs::nsRestyleHint;
 use gecko_bindings::structs::nsStyleBackground;
@@ -1966,7 +1967,8 @@ extern "C" {
 }
 extern "C" {
     pub fn Servo_ParseStyleAttribute(data: *const nsACString,
-                                     extra_data: *mut RawGeckoURLExtraData)
+                                     extra_data: *mut RawGeckoURLExtraData,
+                                     quirks_mode: nsCompatibility)
      -> RawServoDeclarationBlockStrong;
 }
 extern "C" {

components/style/gecko/wrapper.rs

@@ -336,8 +336,9 @@ impl<'le> fmt::Debug for GeckoElement<'le> {
 impl<'le> GeckoElement<'le> {
     /// Parse the style attribute of an element.
     pub fn parse_style_attribute(value: &str,
-                                 url_data: &UrlExtraData) -> PropertyDeclarationBlock {
-        parse_style_attribute(value, url_data, &RustLogReporter, QuirksMode::NoQuirks)
+                                 url_data: &UrlExtraData,
+                                 quirks_mode: QuirksMode) -> PropertyDeclarationBlock {
+        parse_style_attribute(value, url_data, &RustLogReporter, quirks_mode)
     }
 
     fn flags(&self) -> u32 {