LibWeb: Rename Document::for_each_css_style_sheet for clarity

This only iterates style sheets that are in use, so make this clear by
renaming it to `for_each_active_css_style_sheet()`.

Userland/Libraries/LibWeb/CSS/StyleComputer.cpp

@@ -269,7 +269,7 @@ void StyleComputer::for_each_stylesheet(CascadeOrigin cascade_origin, Callback c
             callback(*m_user_style_sheet, {});
     }
     if (cascade_origin == CascadeOrigin::Author) {
-        document().for_each_css_style_sheet([&](CSSStyleSheet& sheet) {
+        document().for_each_active_css_style_sheet([&](CSSStyleSheet& sheet) {
             callback(sheet, {});
         });
 

Userland/Libraries/LibWeb/DOM/Document.cpp

@@ -2706,7 +2706,7 @@ void Document::evaluate_media_rules()
         return;
 
     bool any_media_queries_changed_match_state = false;
-    for_each_css_style_sheet([&](CSS::CSSStyleSheet& style_sheet) {
+    for_each_active_css_style_sheet([&](CSS::CSSStyleSheet& style_sheet) {
         if (style_sheet.evaluate_media_queries(*window))
             any_media_queries_changed_match_state = true;
     });
@@ -5108,7 +5108,7 @@ WebIDL::ExceptionOr<void> Document::set_adopted_style_sheets(JS::Value new_value
     return {};
 }
 
-void Document::for_each_css_style_sheet(Function<void(CSS::CSSStyleSheet&)>&& callback) const
+void Document::for_each_active_css_style_sheet(Function<void(CSS::CSSStyleSheet&)>&& callback) const
 {
     if (m_style_sheets) {
         for (auto& style_sheet : m_style_sheets->sheets()) {

Userland/Libraries/LibWeb/DOM/Document.h

@@ -161,7 +161,7 @@ public:
     CSS::StyleSheetList& style_sheets();
     CSS::StyleSheetList const& style_sheets() const;
 
-    void for_each_css_style_sheet(Function<void(CSS::CSSStyleSheet&)>&& callback) const;
+    void for_each_active_css_style_sheet(Function<void(CSS::CSSStyleSheet&)>&& callback) const;
 
     CSS::StyleSheetList* style_sheets_for_bindings() { return &style_sheets(); }