[Async][WIP] Call FrameLoader::checkCompleted() asynchronously to avoid sync body.onload()

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

Index: third_party/WebKit/Source/web/tests/FrameTestHelpers.cpp
diff --git a/third_party/WebKit/Source/web/tests/FrameTestHelpers.cpp b/third_party/WebKit/Source/web/tests/FrameTestHelpers.cpp
index 52c28c289d69c58dc38cfbece7c7b633d8781e2a..8f895c2f73f5940d6c0920604674260a583e92ea 100644
--- a/third_party/WebKit/Source/web/tests/FrameTestHelpers.cpp
+++ b/third_party/WebKit/Source/web/tests/FrameTestHelpers.cpp
@@ -293,6 +293,11 @@ void WebViewHelper::reset()
         m_webViewWidget = nullptr;
     }
     if (m_webView) {
+        // Loading completion is handled asynchronously
+        // (FrameLoader::checkCompleted()), so we call runPendingTasks() here
+        // to make sure loading is completed and
+        // the ASSERT() in the following line is successful.
+        testing::runPendingTasks();
         ASSERT(m_webView->mainFrame()->isWebRemoteFrame() || !testClientForFrame(m_webView->mainFrame())->isLoading());
         m_webView->willCloseLayerTreeView();
         m_webView->close();