Raster display item lists via a visual rect RTree.

third_party/WebKit/Source/web/LinkHighlightImpl.cpp

Index: third_party/WebKit/Source/web/LinkHighlightImpl.cpp
diff --git a/third_party/WebKit/Source/web/LinkHighlightImpl.cpp b/third_party/WebKit/Source/web/LinkHighlightImpl.cpp
index 4996a44161e21732940eb9e3250eb8718db56b69..72f240f324802e28c11e4be220f208954bf379ea 100644
--- a/third_party/WebKit/Source/web/LinkHighlightImpl.cpp
+++ b/third_party/WebKit/Source/web/LinkHighlightImpl.cpp
@@ -270,7 +270,8 @@ void LinkHighlightImpl::paintContents(WebDisplayItemList* webDisplayItemList, We
         return;
 
     SkPictureRecorder recorder;
-    SkCanvas* canvas = recorder.beginRecording(paintableRegion().width(), paintableRegion().height());
+    gfx::Rect visualRect = paintableRegion();
+    SkCanvas* canvas = recorder.beginRecording(visualRect.width(), visualRect.height());
 
     SkPaint paint;
     paint.setStyle(SkPaint::kFill_Style);
@@ -279,8 +280,8 @@ void LinkHighlightImpl::paintContents(WebDisplayItemList* webDisplayItemList, We
     canvas->drawPath(m_path.skPath(), paint);
 
     RefPtr<const SkPicture> picture = adoptRef(recorder.endRecording());
-    // TODO(wkorman): Pass actual visual rect with the drawing item.
-    webDisplayItemList->appendDrawingItem(IntRect(), picture.get());
+    // TODO(wkorman): Consider using m_path.skPath().getBounds() as the visual rect below.
+    webDisplayItemList->appendDrawingItem(WebRect(visualRect.x(), visualRect.y(), visualRect.width(), visualRect.height()), picture.get());
 }
 
 void LinkHighlightImpl::startHighlightAnimationIfNeeded()