Use tighter typing in editing: InsertParagraphSeparatorCommand / InsertTextCommand

Source/core/editing/InsertTextCommand.cpp

Index: Source/core/editing/InsertTextCommand.cpp
diff --git a/Source/core/editing/InsertTextCommand.cpp b/Source/core/editing/InsertTextCommand.cpp
index b3bd919775890c00104832149d314496fa4cd7b8..d029560703e806ee8f2e3d599f803629afa137d8 100644
--- a/Source/core/editing/InsertTextCommand.cpp
+++ b/Source/core/editing/InsertTextCommand.cpp
@@ -49,7 +49,7 @@ Position InsertTextCommand::positionInsideTextNode(const Position& p)
 {
     Position pos = p;
     if (isTabHTMLSpanElementTextNode(pos.anchorNode())) {
-        RefPtrWillBeRawPtr<Node> textNode = document().createEditingTextNode("");
+        RefPtrWillBeRawPtr<Text> textNode = document().createEditingTextNode("");
         insertNodeAtTabSpanPosition(textNode.get(), pos);
         return firstPositionInNode(textNode.get());
     }
@@ -57,7 +57,7 @@ Position InsertTextCommand::positionInsideTextNode(const Position& p)
     // Prepare for text input by looking at the specified position.
     // It may be necessary to insert a text node to receive characters.
     if (!pos.containerNode()->isTextNode()) {
-        RefPtrWillBeRawPtr<Node> textNode = document().createEditingTextNode("");
+        RefPtrWillBeRawPtr<Text> textNode = document().createEditingTextNode("");
         insertNodeAt(textNode.get(), pos);
         return firstPositionInNode(textNode.get());
     }