Revert of Re-enable SitePerProcessBrowserTest.CrossSiteIframe

chrome/browser/ui/cocoa/applescript/tab_applescript.mm

Index: chrome/browser/ui/cocoa/applescript/tab_applescript.mm
diff --git a/chrome/browser/ui/cocoa/applescript/tab_applescript.mm b/chrome/browser/ui/cocoa/applescript/tab_applescript.mm
index 3dec7e5ae9bb9b482a30c0c1a3d2387701232f20..17ee0e4a2b5b9c200b4bf5ee8897bf7a23ae7baa 100644
--- a/chrome/browser/ui/cocoa/applescript/tab_applescript.mm
+++ b/chrome/browser/ui/cocoa/applescript/tab_applescript.mm
@@ -208,7 +208,15 @@
 }
 
 - (void)handlesStopScriptCommand:(NSScriptCommand*)command {
-  webContents_->Stop();
+  RenderViewHost* view = webContents_->GetRenderViewHost();
+  if (!view) {
+    // We tolerate Stop being called even before a view has been created.
+    // So just log a warning instead of a NOTREACHED().
+    DLOG(WARNING) << "Stop: no view for handle ";
+    return;
+  }
+
+  view->Stop();
 }
 
 - (void)handlesPrintScriptCommand:(NSScriptCommand*)command {