Clean up unnecessary conditionals in WebViewImpl

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index 640748994f2cc102c31d19601cf721b0828302e2..101cb34ea9d74a4341c2bfeffbbd1bf929426ee3 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -4159,6 +4159,12 @@ void WebViewImpl::setRootGraphicsLayer(GraphicsLayer* layer)
         m_rootLayer = pinchViewport.rootGraphicsLayer()->platformLayer();
         m_rootTransformLayer = pinchViewport.rootGraphicsLayer();
         updateRootLayerTransform();
+        m_layerTreeView->setRootLayer(*m_rootLayer);
+        // We register viewport layers here since there may not be a layer
+        // tree view prior to this point.
+        page()->frameHost().pinchViewport().registerLayersWithTreeView(m_layerTreeView);
+        if (m_pageOverlays)
+            m_pageOverlays->update();
     } else {
         m_rootGraphicsLayer = nullptr;
         m_rootLayer = nullptr;
@@ -4167,20 +4173,8 @@ void WebViewImpl::setRootGraphicsLayer(GraphicsLayer* layer)
         // commits until Blink generates invalidations so we don't
         // attempt to paint too early in the next page load.
         m_layerTreeView->setDeferCommits(true);
-    }
-
-    if (m_layerTreeView) {
-        if (m_rootLayer) {
-            m_layerTreeView->setRootLayer(*m_rootLayer);
-            // We register viewport layers here since there may not be a layer
-            // tree view prior to this point.
-            page()->frameHost().pinchViewport().registerLayersWithTreeView(m_layerTreeView);
-            if (m_pageOverlays)
-                m_pageOverlays->update();
-        } else {
-            m_layerTreeView->clearRootLayer();
-            page()->frameHost().pinchViewport().clearLayersForTreeView(m_layerTreeView);
-        }
+        m_layerTreeView->clearRootLayer();
+        page()->frameHost().pinchViewport().clearLayersForTreeView(m_layerTreeView);
     }
 
     suppressInvalidations(false);