Move StyledMarkupAccumulator::shouldApplyWrappingStyle to its serializer

Source/core/editing/StyledMarkupSerializer.cpp

Index: Source/core/editing/StyledMarkupSerializer.cpp
diff --git a/Source/core/editing/StyledMarkupSerializer.cpp b/Source/core/editing/StyledMarkupSerializer.cpp
index 4b10abcb39f8d0ee3cb0fed86f596222c00ed9ad..6b1b0536494bde1b1695c8ffe4cfba0755e08a37 100644
--- a/Source/core/editing/StyledMarkupSerializer.cpp
+++ b/Source/core/editing/StyledMarkupSerializer.cpp
@@ -241,7 +241,7 @@ Node* StyledMarkupSerializer<Strategy>::traverseNodesForSerialization(Node* star
         } else {
             // Add the node to the markup if we're not skipping the descendants
             if (markupAccumulator)
-                markupAccumulator->appendStartTag(*n);
+                appendStartMarkup(*markupAccumulator, *n);
 
             // If node has no children, close the tag now.
             if (Strategy::hasChildren(*n)) {
@@ -337,6 +337,26 @@ RefPtrWillBeRawPtr<EditingStyle> StyledMarkupSerializer<Strategy>::createInlineS
     return inlineStyle;
 }
 
+template<typename Strategy>
+void StyledMarkupSerializer<Strategy>::appendStartMarkup(StyledMarkupAccumulator& accumulator, Node& node)
+{
+    switch (node.nodeType()) {
+    case Node::TEXT_NODE: {
+        Text& text = toText(node);
+        ContainerNode* parent = Strategy::parent(text);

[yosin_UTC9, 2015/06/12 12:09:55]

For checking text in TEXTAREA, we should take parent in DOM tree even
if we traverse in composed tree. In composed tree, text nodes are inside
editable element in shadow tree.

[hajimehoshi, 2015/06/16 08:15:18]

Done.

+        if (parent && parent->isElementNode() && toElement(parent)->tagQName() == textareaTag) {
+            accumulator.appendText(text);
+            return;
+        }
+        accumulator.appendTextWithWrappingStyle(text);

[yosin_UTC9, 2015/06/12 12:09:55]

I think we may want to calculate inline style here and pass to
|appendTextWithWrappingStyle()|

[hajimehoshi, 2015/06/16 08:15:18]

Done.

+        break;
+    }
+    default:
+        accumulator.appendStartMarkup(node);
+        break;
+    }
+}
+
 template class StyledMarkupSerializer<EditingStrategy>;
 
 } // namespace blink