Moved MQ parsing block tracking to tokenizer

Source/core/css/parser/MediaQueryBlockWatcher.h

Index: Source/core/css/parser/MediaQueryBlockWatcher.h
diff --git a/Source/core/css/parser/MediaQueryBlockWatcher.h b/Source/core/css/parser/MediaQueryBlockWatcher.h
new file mode 100644
index 0000000000000000000000000000000000000000..73937c06653f4d1e58b1e30f36f62191655b3598
--- /dev/null
+++ b/Source/core/css/parser/MediaQueryBlockWatcher.h
@@ -0,0 +1,25 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MediaQueryBlockWatcher_h
+#define MediaQueryBlockWatcher_h
+
+namespace WebCore {
+
+class MediaQueryToken;
+
+class MediaQueryBlockWatcher {
+public:
+
+    MediaQueryBlockWatcher();
+    void handleToken(const MediaQueryToken&);
+    unsigned blockLevel() const { return m_blockLevel; }
+
+private:
+    unsigned m_blockLevel;
+};
+
+} // namespace
+
+#endif // MediaQueryBlockWatcher_h