Make VirtualTimeTest fast

third_party/WebKit/Source/web/tests/VirtualTimeTest.cpp

Index: third_party/WebKit/Source/web/tests/VirtualTimeTest.cpp
diff --git a/third_party/WebKit/Source/web/tests/VirtualTimeTest.cpp b/third_party/WebKit/Source/web/tests/VirtualTimeTest.cpp
index 76c8855b10b238826bd308fd7b167bd109946ede..a1c4451ff3de88994f9599bf992777454606ca3b 100644
--- a/third_party/WebKit/Source/web/tests/VirtualTimeTest.cpp
+++ b/third_party/WebKit/Source/web/tests/VirtualTimeTest.cpp
@@ -41,6 +41,14 @@ protected:
             WebScriptSource(WebString(scriptSource)), false, &callbackHelper);
         return callbackHelper.result();
     }
+
+    void TearDown() override
+    {
+        // The SimTest destructor calls runPendingTasks. This is a problem because if there are
+        // any repeating tasks, advancing virtual time will cause the runloop to busy loop. Pausing
+        // virtual time here fixes that.
+        webView().scheduler()->setVirtualTimePolicy(WebViewScheduler::VirtualTimePolicy::PAUSE);
+    }
 };
 
 namespace {