Bug 1321157 - Remove some unnecessary stylo NS_ERROR in nsDocument. r=heycam

MozReview-Commit-ID: JJeArvlHKs6

--HG--
extra : rebase_source : 3a74cf5f7bad6d326745b58f86bd260c78625722

dom/base/nsDocument.cpp

@@ -1191,12 +1191,7 @@ nsDOMStyleSheetSetList::EnsureFresh()
   for (int32_t index = 0; index < count; index++) {
     StyleSheet* sheet = mDocument->GetStyleSheetAt(index);
     NS_ASSERTION(sheet, "Null sheet in sheet list!");
-    // XXXheycam ServoStyleSheets don't expose their title yet.
-    if (sheet->IsServo()) {
-      NS_ERROR("stylo: ServoStyleSets don't expose their title yet");
-      continue;
-    }
-    sheet->AsGecko()->GetTitle(title);
+    sheet->GetTitle(title);
     if (!title.IsEmpty() && !mNames.Contains(title) && !Add(title)) {
       return;
     }
@@ -3968,11 +3963,7 @@ nsDocument::AddStyleSheetToStyleSets(StyleSheet* aSheet)
     className##Init init;                                                     \
     init.mBubbles = true;                                                     \
     init.mCancelable = true;                                                  \
-    /* XXXheycam ServoStyleSheet doesn't implement DOM interfaces yet */      \
-    if (aSheet->IsServo()) {                                                  \
-      NS_ERROR("stylo: can't dispatch events for ServoStyleSheets yet");      \
-    }                                                                         \
-    init.mStylesheet = aSheet->IsGecko() ? aSheet->AsGecko() : nullptr;       \
+    init.mStylesheet = aSheet;                                                \
     init.memberName = argName;                                                \
                                                                               \
     RefPtr<className> event =                                               \
@@ -6005,20 +5996,12 @@ nsIDocument::GetSelectedStyleSheetSet(nsAString& aSheetSet)
     StyleSheet* sheet = GetStyleSheetAt(index);
     NS_ASSERTION(sheet, "Null sheet in sheet list!");
 
-    // XXXheycam Make this work with ServoStyleSheets.
-    if (sheet->IsServo()) {
-      NS_ERROR("stylo: can't handle alternate ServoStyleSheets yet");
-      continue;
-    }
-
-    bool disabled;
-    sheet->AsGecko()->GetDisabled(&disabled);
-    if (disabled) {
+    if (sheet->Disabled()) {
       // Disabled sheets don't affect the currently selected set
       continue;
     }
 
-    sheet->AsGecko()->GetTitle(title);
+    sheet->GetTitle(title);
 
     if (aSheetSet.IsEmpty()) {
       aSheetSet = title;