Remove the unnecessary blockquote after indenting an empty blockquote

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

 /*
  * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 118 matching lines @@
     if (!elementToSplitTo)
         return;
 
     Node* outerBlock = (start.computeContainerNode() == elementToSplitTo) ? start.computeContainerNode() : splitTreeToNode(start.computeContainerNode(), elementToSplitTo);
 
     VisiblePosition startOfContents = createVisiblePosition(start);
     if (!targetBlockquote) {
         // Create a new blockquote and insert it as a child of the root editable element. We accomplish
         // this by splitting all parents of the current paragraph up to that point.
         targetBlockquote = createBlockElement();
-        if (outerBlock == start.computeContainerNode())
-            insertNodeAt(targetBlockquote, start, editingState);
-        else
+        if (outerBlock == start.computeContainerNode()) {
+            // When we apply indent to an empty <blockquote>, we should call insertNodeAfter().
+            // See http://crbug.com/625802 for more details.
+            if (outerBlock->hasTagName(blockquoteTag))
+                insertNodeAfter(targetBlockquote, outerBlock, editingState);
+            else
+                insertNodeAt(targetBlockquote, start, editingState);
+        } else
             insertNodeBefore(targetBlockquote, outerBlock, editingState);
         if (editingState->isAborted())
             return;
         startOfContents = VisiblePosition::inParentAfterNode(*targetBlockquote);
     }
 
     VisiblePosition endOfContents = createVisiblePosition(end);
     if (startOfContents.isNull() || endOfContents.isNull())
         return;
     moveParagraphWithClones(startOfContents, endOfContents, targetBlockquote, outerBlock, editingState);
@@ skipping 128 matching lines @@
     bool indentingAsListItemResult = tryIndentingAsListItem(start, end, editingState);
     if (editingState->isAborted())
         return;
     if (indentingAsListItemResult)
         blockquoteForNextIndent = nullptr;
     else
         indentIntoBlockquote(start, end, blockquoteForNextIndent, editingState);
 }
 
 } // namespace blink