Add deprecation message for -webkit-background-composite

third_party/WebKit/Source/core/css/parser/CSSParserImpl.cpp

 // 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.
 
 #include "core/css/parser/CSSParserImpl.h"
 
 #include "core/css/CSSCustomPropertyDeclaration.h"
 #include "core/css/CSSKeyframesRule.h"
 #include "core/css/CSSStyleSheet.h"
 #include "core/css/StylePropertySet.h"
@@ skipping 674 matching lines @@
     }
 }
 
 void CSSParserImpl::consumeDeclaration(CSSParserTokenRange range, StyleRule::Type ruleType)
 {
     CSSParserTokenRange rangeCopy = range; // For inspector callbacks
 
     ASSERT(range.peek().type() == IdentToken);
     const CSSParserToken& token = range.consumeIncludingWhitespace();
     CSSPropertyID unresolvedProperty = token.parseAsUnresolvedCSSPropertyID();
+    if (m_styleSheet && m_styleSheet->singleOwnerDocument())
+        UseCounter::showDeprecationWarning(m_styleSheet->singleOwnerDocument()->frame(), unresolvedProperty);
     if (range.consume().type() != ColonToken)
         return; // Parse error
 
     bool important = false;
     const CSSParserToken* declarationValueEnd = range.end();
     const CSSParserToken* last = range.end() - 1;
     while (last->type() == WhitespaceToken)
         --last;
     if (last->type() == IdentToken && last->valueEqualsIgnoringCase("important")) {
         --last;
@@ skipping 50 matching lines @@
         else
             return nullptr; // Parser error, invalid value in keyframe selector
         if (range.atEnd())
             return result.release();
         if (range.consume().type() != CommaToken)
             return nullptr; // Parser error
     }
 }
 
 } // namespace blink