[Editing][BugFix] Fix if condition in ReplaceSelectionCommand

third_party/WebKit/Source/core/editing/commands/ReplaceSelectionCommand.cpp

Index: third_party/WebKit/Source/core/editing/commands/ReplaceSelectionCommand.cpp
diff --git a/third_party/WebKit/Source/core/editing/commands/ReplaceSelectionCommand.cpp b/third_party/WebKit/Source/core/editing/commands/ReplaceSelectionCommand.cpp
index 5eef8486a3ba1f1926a0aaf780173a5a5a686a53..5add5329865fd6ba67eda705e647cb0efc4247c8 100644
--- a/third_party/WebKit/Source/core/editing/commands/ReplaceSelectionCommand.cpp
+++ b/third_party/WebKit/Source/core/editing/commands/ReplaceSelectionCommand.cpp
@@ -1013,10 +1013,11 @@ void ReplaceSelectionCommand::doApply()
         applyCommandToComposite(BreakBlockquoteCommand::create(document()));
         // This will leave a br between the split.
         Node* br = endingSelection().start().anchorNode();
-        ASSERT(isHTMLBRElement(br));
-        // Insert content between the two blockquotes, but remove the br (since it was just a placeholder).
-        insertionPos = positionInParentBeforeNode(*br);
-        removeNode(br);
+        if (isHTMLBRElement(br)) {
+            // Insert content between the two blockquotes, but remove the br (since it was just a placeholder).
+            insertionPos = positionInParentBeforeNode(*br);
+            removeNode(br);
+        }
     }
 
     // Inserting content could cause whitespace to collapse, e.g. inserting <div>foo</div> into hello^ world.