Remove unnecessary conditional check while deciding for XML viewer mode.

Source/core/xml/parser/XMLDocumentParser.cpp

Index: Source/core/xml/parser/XMLDocumentParser.cpp
diff --git a/Source/core/xml/parser/XMLDocumentParser.cpp b/Source/core/xml/parser/XMLDocumentParser.cpp
index a55bd1acf49c8c754a2cb2ee97637ba991eb4b63..fc75901eb51ae117fe1885ff83f445b8675c7c95 100644
--- a/Source/core/xml/parser/XMLDocumentParser.cpp
+++ b/Source/core/xml/parser/XMLDocumentParser.cpp
@@ -1438,10 +1438,9 @@ void XMLDocumentParser::doEnd()
 
     XMLTreeViewer xmlTreeViewer(document());
     bool xmlViewerMode = !m_sawError && !m_sawCSS && !m_sawXSLTransform && xmlTreeViewer.hasNoStyleInformation();
-    if (xmlViewerMode)
+    if (xmlViewerMode) {
         xmlTreeViewer.transformDocumentToTreeView();
-
-    if (m_sawXSLTransform) {
+    } else if (m_sawXSLTransform) {
         xmlDocPtr doc = xmlDocPtrForString(document()->cachedResourceLoader(), m_originalSourceForTransform.toString(), document()->url().string());
         document()->setTransformSource(adoptPtr(new TransformSource(doc)));