[Typed-OM] Enable getting CSSURLImageValue from stylemap

third_party/WebKit/Source/core/css/cssom/StyleValueFactory.cpp

Index: third_party/WebKit/Source/core/css/cssom/StyleValueFactory.cpp
diff --git a/third_party/WebKit/Source/core/css/cssom/StyleValueFactory.cpp b/third_party/WebKit/Source/core/css/cssom/StyleValueFactory.cpp
index 2d5dd5a0a2a2d6e4db9076cc6a5d383a1faa0903..0c930d29eb22acbf5d4e0eb2ff7b648a6380b46b 100644
--- a/third_party/WebKit/Source/core/css/cssom/StyleValueFactory.cpp
+++ b/third_party/WebKit/Source/core/css/cssom/StyleValueFactory.cpp
@@ -4,6 +4,7 @@
 
 #include "core/css/cssom/StyleValueFactory.h"
 
+#include "core/css/CSSImageValue.h"
 #include "core/css/CSSValue.h"
 #include "core/css/cssom/CSSNumberValue.h"
 #include "core/css/cssom/CSSSimpleLength.h"
@@ -11,6 +12,7 @@
 #include "core/css/cssom/CSSStyleVariableReferenceValue.h"
 #include "core/css/cssom/CSSTokenStreamValue.h"
 #include "core/css/cssom/CSSTransformValue.h"
+#include "core/css/cssom/CSSURLImageValue.h"
 #include "core/css/cssom/CSSUnsupportedStyleValue.h"
 
 namespace blink {
@@ -39,6 +41,11 @@ CSSStyleValue* styleValueForProperty(CSSPropertyID propertyID, const CSSValue& v
         return CSSTokenStreamValue::fromCSSValue(toCSSVariableReferenceValue(value));
     }
 
+    if (value.isImageValue()) {
+        const CSSImageValue& imageValue = toCSSImageValue(value);
+        return CSSURLImageValue::create(imageValue.valueWithURLMadeAbsolute());

[esprehn, 2016/08/30 21:39:19]

Note this causes two allocations for every image value because
valueWithURLMadeAbsolute always allocates a new CSSImageValue. That's probably
fine for now, but we might want to reconsider someday.

[anthonyhkf, 2016/08/31 01:45:59]

Acknowledged.

+    }
+
     return nullptr;
 }