Make DisplayItemClient an interface

third_party/WebKit/Source/platform/graphics/paint/ClipDisplayItem.h

Index: third_party/WebKit/Source/platform/graphics/paint/ClipDisplayItem.h
diff --git a/third_party/WebKit/Source/platform/graphics/paint/ClipDisplayItem.h b/third_party/WebKit/Source/platform/graphics/paint/ClipDisplayItem.h
index df1fef7d5c159cf73ee8c07e88f9cc48eb9e6fee..eede2c21ada2e42a84a439773d2a38ab777c8847 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/ClipDisplayItem.h
+++ b/third_party/WebKit/Source/platform/graphics/paint/ClipDisplayItem.h
@@ -17,14 +17,14 @@ namespace blink {
 
 class PLATFORM_EXPORT ClipDisplayItem final : public PairedBeginDisplayItem {
 public:
-    ClipDisplayItem(const DisplayItemClientWrapper& client, Type type, const IntRect& clipRect)
+    ClipDisplayItem(const DisplayItemClient& client, Type type, const IntRect& clipRect)
         : PairedBeginDisplayItem(client, type, sizeof(*this))
         , m_clipRect(clipRect)
     {
         ASSERT(isClipType(type));
     }
 
-    ClipDisplayItem(const DisplayItemClientWrapper& client, Type type, const IntRect& clipRect, Vector<FloatRoundedRect>& roundedRectClips)
+    ClipDisplayItem(const DisplayItemClient& client, Type type, const IntRect& clipRect, Vector<FloatRoundedRect>& roundedRectClips)
         : ClipDisplayItem(client, type, clipRect)
     {
         m_roundedRectClips.swap(roundedRectClips);
@@ -52,7 +52,7 @@ private:
 
 class PLATFORM_EXPORT EndClipDisplayItem final : public PairedEndDisplayItem {
 public:
-    EndClipDisplayItem(const DisplayItemClientWrapper& client, Type type)
+    EndClipDisplayItem(const DisplayItemClient& client, Type type)
         : PairedEndDisplayItem(client, type, sizeof(*this))
     {
         ASSERT(isEndClipType(type));