Move visual rect unioning between paired items to cc::DisplayItemList.

third_party/WebKit/public/platform/WebDisplayItemList.h

Index: third_party/WebKit/public/platform/WebDisplayItemList.h
diff --git a/third_party/WebKit/public/platform/WebDisplayItemList.h b/third_party/WebKit/public/platform/WebDisplayItemList.h
index 91659e005365d1254fafb2d7b59f3d636baba72c..2342edbeb17c14ef9d374bd94b106a7f12e85188 100644
--- a/third_party/WebKit/public/platform/WebDisplayItemList.h
+++ b/third_party/WebKit/public/platform/WebDisplayItemList.h
@@ -39,26 +39,26 @@ public:
 
     virtual void appendDrawingItem(const WebRect& visualRect, sk_sp<const SkPicture>) { }
 
-    virtual void appendClipItem(const WebRect& visualRect, const WebRect& clipRect, const WebVector<SkRRect>& roundedClipRects) { }
-    virtual void appendEndClipItem(const WebRect& visualRect) { }
-    virtual void appendClipPathItem(const WebRect& visualRect, const SkPath&, SkRegion::Op, bool antialias) { }
-    virtual void appendEndClipPathItem(const WebRect& visualRect) { }
-    virtual void appendFloatClipItem(const WebRect& visualRect, const WebFloatRect& clipRect) { }
-    virtual void appendEndFloatClipItem(const WebRect& visualRect) { }
-    virtual void appendTransformItem(const WebRect& visualRect, const SkMatrix44&) { }
-    virtual void appendEndTransformItem(const WebRect& visualRect) { }
-    virtual void appendCompositingItem(const WebRect& visualRect, float opacity,
+    virtual void appendClipItem(const WebRect& clipRect, const WebVector<SkRRect>& roundedClipRects) { }
+    virtual void appendEndClipItem() { }
+    virtual void appendClipPathItem(const SkPath&, SkRegion::Op, bool antialias) { }
+    virtual void appendEndClipPathItem() { }
+    virtual void appendFloatClipItem(const WebFloatRect& clipRect) { }
+    virtual void appendEndFloatClipItem() { }
+    virtual void appendTransformItem(const SkMatrix44&) { }
+    virtual void appendEndTransformItem() { }
+    virtual void appendCompositingItem(float opacity,
         SkXfermode::Mode, SkRect* bounds, SkColorFilter*) { }
-    virtual void appendEndCompositingItem(const WebRect& visualRect) { }
+    virtual void appendEndCompositingItem() { }
 
     // TODO(loyso): This should use CompositorFilterOperation. crbug.com/584551
-    virtual void appendFilterItem(const WebRect& visualRect, const cc::FilterOperations&, const WebFloatRect& bounds) { }
-    virtual void appendEndFilterItem(const WebRect& visualRect) { }
+    virtual void appendFilterItem(const cc::FilterOperations&, const WebFloatRect& bounds) { }
+    virtual void appendEndFilterItem() { }
 
     // Scroll containers are identified by an opaque pointer.
     using ScrollContainerId = const void*;
-    virtual void appendScrollItem(const WebRect& visualRect, const WebSize& scrollOffset, ScrollContainerId) { }
-    virtual void appendEndScrollItem(const WebRect& visualRect) { }
+    virtual void appendScrollItem(const WebSize& scrollOffset, ScrollContainerId) { }
+    virtual void appendEndScrollItem() { }
 
     virtual void setIsSuitableForGpuRasterization(bool isSuitable) { }
 };