Speculative fix for titleUpdate test case

After tedious investigation the issue boils down to error prone
synchronization of web engine settings. WebEngineSettings are
synchronized between the browser process and the render process.
Moreover in the browser process the sync message is send to the render
with QTimer::singleShot, which can cause race conditions if
for example QWebPage::setUrl was used meanwhile. This makes
current settings not being picked up by the render process and results
in 'titleUpdate' test case flaky. This happens due to the fact that
ShouldDisplayErrorPageForFailedLoad in the render process frame view
could have invalid value.

Try to sync web engine settings on every adapter load, setContent or
reload.

Mark some flaky settings in tests.

Fixes: QTBUG-83078
Change-Id: I5289472f146e104d5cb6c3b9b20b26d3dc42f4b1
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/core/web_engine_settings.cpp b/src/core/web_engine_settings.cpp
index eb6db9793..c54570b33 100644
--- a/src/core/web_engine_settings.cpp
+++ b/src/core/web_engine_settings.cpp
@@ -333,6 +333,8 @@ void WebEngineSettings::doApply()
 {
     if (webPreferences.isNull())
         return;
+
+    m_batchTimer.stop();
     // Override with our settings when applicable
     applySettingsToWebPreferences(webPreferences.data());
     Q_ASSERT(m_adapter);