Add correct equality testing for ComputedStyle's StyleVariableData

third_party/WebKit/Source/core/css/parser/CSSParserToken.h

Index: third_party/WebKit/Source/core/css/parser/CSSParserToken.h
diff --git a/third_party/WebKit/Source/core/css/parser/CSSParserToken.h b/third_party/WebKit/Source/core/css/parser/CSSParserToken.h
index e4a12c3f55b0906ee9b9bee5f79aa05702ce0357..88d00dc7f257ee8f4b7a751997331e4774366a46 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSParserToken.h
+++ b/third_party/WebKit/Source/core/css/parser/CSSParserToken.h
@@ -82,6 +82,39 @@ public:
 
     CSSParserToken(HashTokenType, CSSParserString);
 
+    bool operator==(const CSSParserToken& other) const
+    {
+        if (m_type != other.m_type)
+            return false;
+        switch (m_type) {
+        case DelimiterToken:
+            return delimiter() == other.delimiter();
+        case HashToken:
+            if (m_hashTokenType != other.m_hashTokenType)
+                return false;
+            // fallthrough
+        case IdentToken:
+        case FunctionToken:
+        case StringToken:
+        case UrlToken:
+            return m_valueDataCharRaw == other.m_valueDataCharRaw && m_valueLength == other.m_valueLength && m_valueIs8Bit == other.m_valueIs8Bit;
+        case NumberToken:
+            if (m_numericSign != other.m_numericSign)
+                return false;
+            // fallthrough
+        case DimensionToken:
+            if (m_valueDataCharRaw != other.m_valueDataCharRaw || m_valueLength != other.m_valueLength || m_valueIs8Bit != other.m_valueIs8Bit)
+                return false;
+            // fallthrough
+        case PercentageToken:
+            return m_numericValue == other.m_numericValue && m_numericValueType == other.m_numericValueType;
+        case UnicodeRangeToken:
+            return m_unicodeRange.start == other.m_unicodeRange.start && m_unicodeRange.end == other.m_unicodeRange.end;
+        default:
+            return true;
+        }
+    }
+
     // Converts NumberToken to DimensionToken.
     void convertToDimensionWithUnit(CSSParserString);