[wrapper-tracing] Clear reporter after lazy cleanup

third_party/WebKit/Source/bindings/core/v8/ScriptWrappableVisitor.cpp

Index: third_party/WebKit/Source/bindings/core/v8/ScriptWrappableVisitor.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/ScriptWrappableVisitor.cpp b/third_party/WebKit/Source/bindings/core/v8/ScriptWrappableVisitor.cpp
index 86ed1b1de255d4768a18efcef3be8eb5e46c700b..1ed50fa5db2fb9b13bc4c1b828478dc8e89c5c38 100644
--- a/third_party/WebKit/Source/bindings/core/v8/ScriptWrappableVisitor.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/ScriptWrappableVisitor.cpp
@@ -81,9 +81,9 @@ void ScriptWrappableVisitor::performCleanup() {
   m_headersToUnmark.clear();
   m_markingDeque.clear();
   m_verifierDeque.clear();
+  m_reporter = nullptr;
   m_shouldCleanup = false;
   m_tracingInProgress = false;
-  m_reporter = nullptr;
 }
 
 void ScriptWrappableVisitor::scheduleIdleLazyCleanup() {
@@ -137,6 +137,7 @@ void ScriptWrappableVisitor::performLazyCleanup(double deadlineSeconds) {
   CHECK(m_headersToUnmark.isEmpty());
   m_markingDeque.clear();
   m_verifierDeque.clear();
+  m_reporter = nullptr;
   m_shouldCleanup = false;
   m_tracingInProgress = false;
 }