remove memoryinstrumentation

Source/core/css/CSSImageValue.cpp

Index: Source/core/css/CSSImageValue.cpp
diff --git a/Source/core/css/CSSImageValue.cpp b/Source/core/css/CSSImageValue.cpp
index a21383f81f67e368f96fd2bfb37c0e127a7cde3b..a24011ace0a5ff312598a324b1c370e6da6f328b 100644
--- a/Source/core/css/CSSImageValue.cpp
+++ b/Source/core/css/CSSImageValue.cpp
@@ -33,7 +33,6 @@
 #include "MemoryCache.h"
 #include "StyleCachedImage.h"
 #include "StylePendingImage.h"
-#include "WebCoreMemoryInstrumentation.h"
 
 namespace WebCore {
 
@@ -111,13 +110,6 @@ PassRefPtr<CSSValue> CSSImageValue::cloneForCSSOM() const
     return uriValue.release();
 }
 
-void CSSImageValue::reportDescendantMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
-{
-    MemoryClassInfo info(memoryObjectInfo, this, WebCoreMemoryTypes::CSS);
-    info.addMember(m_url, "url");
-    // No need to report m_image as it is counted as part of RenderArena.
-}
-
 bool CSSImageValue::knownToBeOpaque(const RenderObject* renderer) const
 {
     return m_image ? m_image->knownToBeOpaque(renderer) : false;