Add a test that we resume commits after inserting the body.

Source/web/tests/sim/SimLayerTreeView.cpp

Index: Source/web/tests/sim/SimLayerTreeView.cpp
diff --git a/Source/platform/exported/WebMemoryAllocatorDump.cpp b/Source/web/tests/sim/SimLayerTreeView.cpp
similarity index 63%
copy from Source/platform/exported/WebMemoryAllocatorDump.cpp
copy to Source/web/tests/sim/SimLayerTreeView.cpp
index b28f540081b18e3a6ea6284cfe0165f15b24576b..d06e4359dbcfa20fb222ccf5e2e5afcb8dc93744 100644
--- a/Source/platform/exported/WebMemoryAllocatorDump.cpp
+++ b/Source/web/tests/sim/SimLayerTreeView.cpp
@@ -3,11 +3,13 @@
 // found in the LICENSE file.
 
 #include "config.h"
-#include "public/platform/WebMemoryAllocatorDump.h"
+#include "web/tests/sim/SimLayerTreeView.h"
 
 namespace blink {
 
-WebMemoryAllocatorDump::~WebMemoryAllocatorDump()
+SimLayerTreeView::SimLayerTreeView()
+    : m_needsAnimate(false)
+    , m_deferCommits(true)
 {
 }