Make Document.inputEncoding an explicit alias of Document.characterSet

Source/core/dom/StyleEngine.cpp

Index: Source/core/dom/StyleEngine.cpp
diff --git a/Source/core/dom/StyleEngine.cpp b/Source/core/dom/StyleEngine.cpp
index 1d9b331d7e4d70c42bb8bfc93e387026ee21412a..a9808b1c17be30fbf0109c233baf8da97f074be3 100644
--- a/Source/core/dom/StyleEngine.cpp
+++ b/Source/core/dom/StyleEngine.cpp
@@ -631,7 +631,7 @@ PassRefPtrWillBeRawPtr<CSSStyleSheet> StyleEngine::createSheet(Element* e, const
 PassRefPtrWillBeRawPtr<CSSStyleSheet> StyleEngine::parseSheet(Element* e, const String& text, TextPosition startPosition, bool createdByParser)
 {
     RefPtrWillBeRawPtr<CSSStyleSheet> styleSheet = nullptr;
-    styleSheet = CSSStyleSheet::createInline(e, KURL(), startPosition, e->document().inputEncoding());
+    styleSheet = CSSStyleSheet::createInline(e, KURL(), startPosition, e->document().characterSet());
     styleSheet->contents()->parseStringAtPosition(text, startPosition, createdByParser);
     return styleSheet;
 }