Rename nsIDocument to mozilla::dom::Document.

Summary: Really sorry for the size of the patch. It's mostly automatic
s/nsIDocument/Document/ but I had to fix up in a bunch of places manually to
add the right namespacing and such.

Overall it's not a very interesting patch I think.

nsDocument.cpp turns into Document.cpp, nsIDocument.h into Document.h and
nsIDocumentInlines.h into DocumentInlines.h.

I also changed a bunch of nsCOMPtr usage to RefPtr, but not all of it.

While fixing up some of the bits I also removed some unneeded OwnerDoc() null
checks and such, but I didn't do anything riskier than that.

Bug: 1517241
Reviewed-by: smaug

components/style/element_state.rs

@@ -144,7 +144,7 @@ bitflags! {
     /// Event-based document states.
     ///
     /// NB: Is important for this to remain in sync with Gecko's
-    /// dom/base/nsIDocument.h.
+    /// dom/base/Document.h.
     #[derive(MallocSizeOf)]
     pub struct DocumentState: u64 {
         /// RTL locale: specific to the XUL localedir attribute

components/style/gecko/data.rs

@@ -7,8 +7,7 @@
 use crate::context::QuirksMode;
 use crate::dom::TElement;
 use crate::gecko_bindings::bindings::{self, RawServoStyleSet};
-use crate::gecko_bindings::structs::StyleSheet as DomStyleSheet;
-use crate::gecko_bindings::structs::{nsIDocument, StyleSheetInfo};
+use crate::gecko_bindings::structs::{StyleSheet as DomStyleSheet, StyleSheetInfo};
 use crate::gecko_bindings::structs::{RawGeckoPresContextBorrowed, ServoStyleSetSizes};
 use crate::gecko_bindings::sugar::ownership::{HasArcFFI, HasBoxFFI, HasFFI, HasSimpleFFI};
 use crate::invalidation::media_queries::{MediaListKey, ToMediaListKey};
@@ -152,7 +151,7 @@ impl PerDocumentStyleData {
         //
         // Should we just force XBL Stylists to be NoQuirks?
         let quirks_mode =
-            unsafe { (*device.pres_context().mDocument.raw::<nsIDocument>()).mCompatMode };
+            unsafe { (*device.pres_context().mDocument.mRawPtr).mCompatMode };
 
         PerDocumentStyleData(AtomicRefCell::new(PerDocumentStyleDataImpl {
             stylist: Stylist::new(device, quirks_mode.into()),
@@ -198,7 +197,7 @@ impl PerDocumentStyleDataImpl {
             .device()
             .pres_context()
             .mDocument
-            .raw::<nsIDocument>();
+            .mRawPtr;
         unsafe { bindings::Gecko_VisitedStylesEnabled(doc) }
     }
 

components/style/gecko/media_queries.rs

@@ -162,8 +162,8 @@ impl Device {
 
     /// Gets the document pointer.
     #[inline]
-    pub fn document(&self) -> *mut structs::nsIDocument {
-        self.pres_context().mDocument.raw::<structs::nsIDocument>()
+    pub fn document(&self) -> *mut structs::Document {
+        self.pres_context().mDocument.mRawPtr
     }
 
     /// Recreates the default computed values.

components/style/gecko/wrapper.rs

@@ -45,7 +45,7 @@ use crate::gecko_bindings::bindings::{Gecko_ElementState, Gecko_GetDocumentLWThe
 use crate::gecko_bindings::bindings::{Gecko_SetNodeFlags, Gecko_UnsetNodeFlags};
 use crate::gecko_bindings::structs;
 use crate::gecko_bindings::structs::nsChangeHint;
-use crate::gecko_bindings::structs::nsIDocument_DocumentTheme as DocumentTheme;
+use crate::gecko_bindings::structs::Document_DocumentTheme as DocumentTheme;
 use crate::gecko_bindings::structs::nsRestyleHint;
 use crate::gecko_bindings::structs::EffectCompositor_CascadeLevel as CascadeLevel;
 use crate::gecko_bindings::structs::ELEMENT_HANDLED_SNAPSHOT;
@@ -107,9 +107,9 @@ fn elements_with_id<'a, 'le>(
     }
 }
 
-/// A simple wrapper over `nsIDocument`.
+/// A simple wrapper over `Document`.
 #[derive(Clone, Copy)]
-pub struct GeckoDocument<'ld>(pub &'ld structs::nsIDocument);
+pub struct GeckoDocument<'ld>(pub &'ld structs::Document);
 
 impl<'ld> TDocument for GeckoDocument<'ld> {
     type ConcreteNode = GeckoNode<'ld>;
@@ -121,7 +121,7 @@ impl<'ld> TDocument for GeckoDocument<'ld> {
 
     #[inline]
     fn is_html_document(&self) -> bool {
-        self.0.mType == structs::root::nsIDocument_Type::eHTML
+        self.0.mType == structs::Document_Type::eHTML
     }
 
     #[inline]
@@ -1242,11 +1242,11 @@ impl<'le> TElement for GeckoElement<'le> {
     }
 
     fn owner_doc_matches_for_testing(&self, device: &Device) -> bool {
-        self.as_node().owner_doc().0 as *const structs::nsIDocument ==
+        self.as_node().owner_doc().0 as *const structs::Document ==
             device
                 .pres_context()
                 .mDocument
-                .raw::<structs::nsIDocument>()
+                .mRawPtr
     }
 
     fn style_attribute(&self) -> Option<ArcBorrow<Locked<PropertyDeclarationBlock>>> {