Inform the WebFrameClient of BeforeUnload/Unload handlers

Source/web/FrameLoaderClientImpl.cpp

Index: Source/web/FrameLoaderClientImpl.cpp
diff --git a/Source/web/FrameLoaderClientImpl.cpp b/Source/web/FrameLoaderClientImpl.cpp
index 7b4a5236e2964744cfb99e8f8b8a90f54f2b50d4..99f88aa26698ba96a637475fe8bc2b7c4b01b405 100644
--- a/Source/web/FrameLoaderClientImpl.cpp
+++ b/Source/web/FrameLoaderClientImpl.cpp
@@ -929,4 +929,12 @@ unsigned FrameLoaderClientImpl::backForwardLength()
     return webview->client()->historyBackListCount() + 1 + webview->client()->historyForwardListCount();
 }
 
+void FrameLoaderClientImpl::suddenTerminationDisablerChanged(int variation, SuddenTerminationDisablerType type)
+{
+    if (m_webFrame->client()) {
+        m_webFrame->client()->suddenTerminationDisablerChanged(
+            variation, static_cast<WebFrameClient::SuddenTerminationDisablerType>(type));
+    }
+}
+
 } // namespace blink