[SPInvalidation] Update paint properties of frame subtree when unthrottled

third_party/WebKit/Source/core/frame/FrameView.cpp

Index: third_party/WebKit/Source/core/frame/FrameView.cpp
diff --git a/third_party/WebKit/Source/core/frame/FrameView.cpp b/third_party/WebKit/Source/core/frame/FrameView.cpp
index 77f8743316317c6bcf66c7f7170762e1e70cac71..e7d5140cf669d804c1727be5cfccf24116ced403 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.cpp
+++ b/third_party/WebKit/Source/core/frame/FrameView.cpp
@@ -4616,6 +4616,9 @@ void FrameView::updateRenderThrottlingStatus(bool hidden,
     LayoutViewItem layoutViewItem = this->layoutViewItem();
     if (!layoutViewItem.isNull())
       layoutViewItem.invalidatePaintForViewAndCompositedLayers();
+    // Also need to update all paint properties that might be skipped while
+    // the frame was throttled.
+    setSubtreeNeedsPaintPropertyUpdate();
   }
 
   bool hasHandlers = m_frame->host() &&