HTML parser: Add show/toString() debug helper methods

third_party/WebKit/Source/core/html/parser/AtomicHTMLToken.cpp

Index: third_party/WebKit/Source/core/html/parser/AtomicHTMLToken.cpp
diff --git a/third_party/WebKit/Source/core/html/parser/AtomicHTMLToken.cpp b/third_party/WebKit/Source/core/html/parser/AtomicHTMLToken.cpp
index cd3348c3fc60de68b6ce5fdbad3134f57386ca23..f6808417331ecef5f7c3818f63bceaa846cdbfc1 100644
--- a/third_party/WebKit/Source/core/html/parser/AtomicHTMLToken.cpp
+++ b/third_party/WebKit/Source/core/html/parser/AtomicHTMLToken.cpp
@@ -21,4 +21,45 @@ bool AtomicHTMLToken::usesAttributes() const
     return m_type == HTMLToken::StartTag || m_type == HTMLToken::EndTag;
 }
 
+#ifndef NDEBUG
+const char* toString(HTMLToken::TokenType type)
+{
+    switch (type) {
+#define DEFINE_STRINGIFY(type) case HTMLToken::type: return #type;
+        DEFINE_STRINGIFY(Uninitialized);
+        DEFINE_STRINGIFY(DOCTYPE);
+        DEFINE_STRINGIFY(StartTag);
+        DEFINE_STRINGIFY(EndTag);
+        DEFINE_STRINGIFY(Comment);
+        DEFINE_STRINGIFY(Character);
+        DEFINE_STRINGIFY(EndOfFile);
+#undef DEFINE_STRINGIFY
+    }
+    return "<unknown>";
+}
+
+void AtomicHTMLToken::show() const
+{
+    printf("AtomicHTMLToken %s", toString(m_type));
+    switch (m_type) {
+    case HTMLToken::StartTag:
+    case HTMLToken::EndTag:
+        if (m_selfClosing)
+            printf(" selfclosing");
+        /* FALL THROUGH */
+    case HTMLToken::DOCTYPE:
+        printf(" name \"%s\"", m_name.getString().utf8().data());
+        break;
+    case HTMLToken::Comment:
+    case HTMLToken::Character:
+        printf(" data \"%s\"", m_data.utf8().data());
+        break;
+    default:
+        break;
+    }
+    // TODO(kouhei): print m_attributes?
+    printf("\n");
+}
+#endif
+
 } // namespace blink