Deduplicating compositing scrollingCoordinator helper

third_party/WebKit/Source/core/paint/PaintLayer.cpp

Index: third_party/WebKit/Source/core/paint/PaintLayer.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintLayer.cpp b/third_party/WebKit/Source/core/paint/PaintLayer.cpp
index 928cee186db1a94e3ed147303b1a3329c249bab8..a6e5064a172b36c5cab3cbdbc1570505246314a0 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayer.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintLayer.cpp
@@ -185,9 +185,8 @@ PaintLayer::~PaintLayer() {
     }
     rare_data_->resource_info->ClearLayer();
   }
-  if (GetLayoutObject().GetFrame() && GetLayoutObject().GetFrame()->GetPage()) {
-    if (ScrollingCoordinator* scrolling_coordinator =
-            GetLayoutObject().GetFrame()->GetPage()->GetScrollingCoordinator())
+  if (GetLayoutObject().GetFrame()) {
+    if (ScrollingCoordinator* scrolling_coordinator = GetScrollingCoordinator())
       scrolling_coordinator->WillDestroyLayer(this);
   }
 
@@ -2749,6 +2748,11 @@ bool PaintLayer::PaintsWithTransform(
           GetCompositingState() != kPaintsIntoOwnBacking);
 }
 
+ScrollingCoordinator* PaintLayer::GetScrollingCoordinator() {
+  Page* page = GetLayoutObject().GetFrame()->GetPage();
+  return (!page) ? nullptr : page->GetScrollingCoordinator();
+}
+
 bool PaintLayer::CompositesWithTransform() const {
   return TransformAncestor() || Transform();
 }