Move implementation of WebFrameImpl::executeCommand to Editor

Source/core/editing/Editor.h

Index: Source/core/editing/Editor.h
diff --git a/Source/core/editing/Editor.h b/Source/core/editing/Editor.h
index 72d5ff460ae26b0549f6fa5bd2399fa817ec3f61..128e7ee33b2916c46cb28b0a1859fc11676beb4b 100644
--- a/Source/core/editing/Editor.h
+++ b/Source/core/editing/Editor.h
@@ -155,6 +155,11 @@ public:
     Command command(const String& commandName); // Command source is CommandFromMenuOrKeyBinding.
     Command command(const String& commandName, EditorCommandSource);
 
+    // |Editor::executeCommand| is implementation of |WebFrame::executeCommand|
+    // rather than |Document::execCommand|.
+    bool executeCommand(const String&);
+    bool executeCommand(const String& commandName, const String& value);
+
     bool insertText(const String&, Event* triggeringEvent);
     bool insertTextWithoutSendingTextEvent(const String&, bool selectInsertedText, TextEvent* triggeringEvent);
     bool insertLineBreak();