PlzNavigate: properly execute BeforeUnload on renderer initiated navigations

third_party/WebKit/Source/web/WebRemoteFrameImpl.cpp

Index: third_party/WebKit/Source/web/WebRemoteFrameImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebRemoteFrameImpl.cpp b/third_party/WebKit/Source/web/WebRemoteFrameImpl.cpp
index 0889a3f70005d2e980887351f7796f26528b1db2..c1d24674d7935fe14626001c69b7b968d697eab2 100644
--- a/third_party/WebKit/Source/web/WebRemoteFrameImpl.cpp
+++ b/third_party/WebKit/Source/web/WebRemoteFrameImpl.cpp
@@ -177,12 +177,6 @@ WebPerformance WebRemoteFrameImpl::performance() const
     return WebPerformance();
 }
 
-bool WebRemoteFrameImpl::dispatchBeforeUnloadEvent()
-{
-    NOTREACHED();
-    return false;
-}
-
 void WebRemoteFrameImpl::dispatchUnloadEvent()
 {
     NOTREACHED();