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 30c95b233a444927b9859f349f167a448c149c11..46f8b1607700c15ee0387a2cffec85c986ca7401 100644
--- a/third_party/WebKit/Source/web/WebRemoteFrameImpl.cpp
+++ b/third_party/WebKit/Source/web/WebRemoteFrameImpl.cpp
@@ -180,12 +180,6 @@ WebPerformance WebRemoteFrameImpl::performance() const
     return WebPerformance();
 }
 
-bool WebRemoteFrameImpl::dispatchBeforeUnloadEvent()
-{
-    NOTREACHED();
-    return false;
-}
-
 void WebRemoteFrameImpl::dispatchUnloadEvent()
 {
     NOTREACHED();