[Devtools] Moved flatten children to children nodes instead of datagrid

third_party/WebKit/LayoutTests/inspector/components/viewport-datagrid-expected.txt

Index: third_party/WebKit/LayoutTests/inspector/components/viewport-datagrid-expected.txt
diff --git a/third_party/WebKit/LayoutTests/inspector/components/viewport-datagrid-expected.txt b/third_party/WebKit/LayoutTests/inspector/components/viewport-datagrid-expected.txt
index 768435284b60a173db1d6690950524236cd22761..23367de103c5577f162225796070781e0890a557 100644
--- a/third_party/WebKit/LayoutTests/inspector/components/viewport-datagrid-expected.txt
+++ b/third_party/WebKit/LayoutTests/inspector/components/viewport-datagrid-expected.txt
@@ -5,11 +5,23 @@ Attached aaa to aa
 Attached aab to aa
 Attached a to root
 Attached aa to a
+Expanded node a
+Checking flatChildren():
+  a
+  aa
+
 Attached ab to a
+Checking flatChildren():
+  a
+  aa
+  ab
+
 Attached b to root
 
 Tree:
  a
+  aa
+  ab
  b
 
 Expanded node a
@@ -94,6 +106,23 @@ Tree:
  b <- selected
 
 Attached aac to ab
+Checking flatChildren():
+  a
+  aa
+  aaa
+  aab
+  ab
+  aac
+  b
+
+Removed children of aa
+Checking flatChildren():
+  a
+  aa
+  ab
+  aac
+  b
+
 
 Tree:
  a
@@ -103,7 +132,20 @@ Tree:
  b
 
 Attached aac to ab
+Checking flatChildren():
+  a
+  aa
+  ab
+  aac
+  b
+
 Removing aa from a
+Checking flatChildren():
+  a
+  ab
+  aac
+  b
+
 
 Tree:
  a