Use tighter typing in editing: BreakBlockquoteCommand & Caret

Source/core/editing/BreakBlockquoteCommand.cpp

Index: Source/core/editing/BreakBlockquoteCommand.cpp
diff --git a/Source/core/editing/BreakBlockquoteCommand.cpp b/Source/core/editing/BreakBlockquoteCommand.cpp
index a3fb03687485fa8cebe6bd2ea81f4e47a8288844..046f379bc0e017fdda6b9906971c1b400f0cf146 100644
--- a/Source/core/editing/BreakBlockquoteCommand.cpp
+++ b/Source/core/editing/BreakBlockquoteCommand.cpp
@@ -173,7 +173,7 @@ void BreakBlockquoteCommand::doApply()
             moveRemainingSiblingsToNewParent(ancestor->nextSibling(), 0, clonedParent);
 
         // If the startNode's original parent is now empty, remove it
-        Node* originalParent = ancestors.first().get();
+        Element* originalParent = ancestors.first().get();
         if (!originalParent->hasChildren())
             removeNode(originalParent);
     }