Add deprecation message for -webkit-background-composite

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

Index: third_party/WebKit/Source/core/css/parser/CSSParserImpl.cpp
diff --git a/third_party/WebKit/Source/core/css/parser/CSSParserImpl.cpp b/third_party/WebKit/Source/core/css/parser/CSSParserImpl.cpp
index 93be952e3cdc4455f546b926a4ba3ca096cb73ed..5fdfa387e254ec0207536ff458c1bec77be7f7a1 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSParserImpl.cpp
+++ b/third_party/WebKit/Source/core/css/parser/CSSParserImpl.cpp
@@ -24,6 +24,7 @@
 #include "core/css/parser/MediaQueryParser.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
+#include "core/frame/Deprecation.h"
 #include "core/frame/UseCounter.h"
 #include "platform/TraceEvent.h"
 #include "wtf/BitArray.h"
@@ -692,6 +693,8 @@ void CSSParserImpl::consumeDeclaration(CSSParserTokenRange range, StyleRule::Typ
     ASSERT(range.peek().type() == IdentToken);
     const CSSParserToken& token = range.consumeIncludingWhitespace();
     CSSPropertyID unresolvedProperty = token.parseAsUnresolvedCSSPropertyID();
+    if (m_styleSheet && m_styleSheet->singleOwnerDocument() && unresolvedProperty != CSSPropertyInvalid)

[Timothy Loh, 2016/01/25 04:48:41]

Probably better to put this at the bottom of the function

[nainar, 2016/01/25 05:33:22]

Done

+        Deprecation::showConsoleWarning(m_styleSheet->singleOwnerDocument()->frame(), unresolvedProperty);

[Timothy Loh, 2016/01/25 04:48:41]

I don't like the naming, this sounds like we're showing a warning for every
property.

[nainar, 2016/01/25 05:33:21]

Done

     if (range.consume().type() != ColonToken)
         return; // Parse error