Remove unused HasStyleSheets

Change-Id: I182f05b751b12cd30ff44f6cb09b6c13cb128510
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2519450
Auto-Submit: Rune Lillesveen <futhark@chromium.org>
Reviewed-by: Anders Hartvoll Ruud <andruud@chromium.org>
Commit-Queue: Rune Lillesveen <futhark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#823979}

third_party/blink/renderer/core/css/style_engine.h

@@ -179,9 +179,6 @@ class CORE_EXPORT StyleEngine final : public GarbageCollected<StyleEngine>,
     DCHECK(global_rule_set_);
     return global_rule_set_->WatchedSelectorsRuleSet();
   }
-  bool HasStyleSheets() const {
-    return GetDocumentStyleSheetCollection().HasStyleSheets();
-  }
 
   RuleSet* RuleSetForSheet(CSSStyleSheet&);
   void MediaQueryAffectingValueChanged(MediaValueChange change);

third_party/blink/renderer/core/css/tree_scope_style_sheet_collection.cc

@@ -58,15 +58,6 @@ void TreeScopeStyleSheetCollection::ApplyActiveStyleSheetChanges(
   new_collection.Swap(*this);
 }
 
-bool TreeScopeStyleSheetCollection::HasStyleSheets() const {
-  for (Node* node : style_sheet_candidate_nodes_) {
-    StyleSheetCandidate candidate(*node);
-    if (candidate.Sheet() || candidate.IsEnabledAndLoading())
-      return true;
-  }
-  return false;
-}
-
 void TreeScopeStyleSheetCollection::UpdateStyleSheetList() {
   if (!sheet_list_dirty_)
     return;

third_party/blink/renderer/core/css/tree_scope_style_sheet_collection.h

@@ -49,7 +49,6 @@ class CORE_EXPORT TreeScopeStyleSheetCollection : public StyleSheetCollection {
   bool HasStyleSheetCandidateNodes() const {
     return !style_sheet_candidate_nodes_.IsEmpty();
   }
-  bool HasStyleSheets() const;
 
   virtual bool IsShadowTreeStyleSheetCollection() const { return false; }
   void UpdateStyleSheetList();