Move DispatchBeforeUnload from RenderFrameHost to WebContents. This is after discussions to move as much stuff as possible to WebContents.

BUG=304341
[email protected]

Review URL: https://codereview.chromium.org/228653007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@262535 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 35c7b9c..39d9d8f 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -999,6 +999,11 @@
           GetRenderViewHost())->SuddenTerminationAllowed();
 }
 
+void WebContentsImpl::DispatchBeforeUnload(bool for_cross_site_transition) {
+  static_cast<RenderFrameHostImpl*>(GetMainFrame())->DispatchBeforeUnload(
+      for_cross_site_transition);
+}
+
 void WebContentsImpl::Stop() {
   GetRenderManager()->Stop();
   FOR_EACH_OBSERVER(WebContentsObserver, observers_, NavigationStopped());