Move global function isInline() to static function in IndentOutdentCommand.cpp

Source/core/editing/commands/IndentOutdentCommand.cpp

Index: Source/core/editing/commands/IndentOutdentCommand.cpp
diff --git a/Source/core/editing/commands/IndentOutdentCommand.cpp b/Source/core/editing/commands/IndentOutdentCommand.cpp
index 4f51c32df5dc7a15a5a190650b87a2b6fefe6fb9..2a48370d5e0d5b8c306bf628ef08178d5a36321c 100644
--- a/Source/core/editing/commands/IndentOutdentCommand.cpp
+++ b/Source/core/editing/commands/IndentOutdentCommand.cpp
@@ -48,6 +48,12 @@ static bool isHTMLListOrBlockquoteElement(const Node* node)
     return isHTMLUListElement(element) || isHTMLOListElement(element) || element.hasTagName(blockquoteTag);
 }
 
+static bool isInline(const Node* node)
+{
+    return node && node->layoutObject() && node->layoutObject()->isInline();
+}
+
+
 IndentOutdentCommand::IndentOutdentCommand(Document& document, EIndentType typeOfAction)
     : ApplyBlockElementCommand(document, blockquoteTag, "margin: 0 0 0 40px; border: none; padding: 0px;")
     , m_typeOfAction(typeOfAction)