Moved MQ parsing block tracking to tokenizer

Source/core/css/parser/MediaQueryParser.h

Index: Source/core/css/parser/MediaQueryParser.h
diff --git a/Source/core/css/parser/MediaQueryParser.h b/Source/core/css/parser/MediaQueryParser.h
index ca2dc5c27e52bdfa51dc39c938d1e50188360b3c..1ac4ee3ccc709662811ee12f8848bbfdb4bddc8a 100644
--- a/Source/core/css/parser/MediaQueryParser.h
+++ b/Source/core/css/parser/MediaQueryParser.h
@@ -64,24 +64,6 @@ private:
 
     PassRefPtrWillBeRawPtr<MediaQuerySet> parseImpl(TokenIterator, TokenIterator endToken);
 
-    enum BlockType {
-        ParenthesisBlock,
-        BracketsBlock,
-        BracesBlock
-    };
-
-    enum StateChange {
-        ModifyState,
-        DoNotModifyState
-    };
-
-    struct BlockParameters {
-        MediaQueryTokenType leftToken;
-        MediaQueryTokenType rightToken;
-        BlockType blockType;
-        StateChange stateChange;
-    };
-
     void processToken(TokenIterator&);
 
     void readRestrictor(MediaQueryTokenType, TokenIterator&);
@@ -99,14 +81,12 @@ private:
     typedef void (MediaQueryParser::*State)(MediaQueryTokenType, TokenIterator&);
 
     void setStateAndRestrict(State, MediaQuery::Restrictor);
-    bool observeBlock(BlockParameters&, MediaQueryTokenType);
-    void observeBlocks(MediaQueryTokenType);
-    static void popIfBlockMatches(Vector<MediaQueryParser::BlockType>& blockStack, BlockType);
+    void handleBlocks(TokenIterator&);
 
     State m_state;
     MediaQueryData m_mediaQueryData;
     RefPtrWillBeMember<MediaQuerySet> m_querySet;
-    Vector<BlockType> m_blockStack;
+    unsigned m_blockLevel;
 
     const static State ReadRestrictor;
     const static State ReadMediaType;