Don't send loading completion callbacks for detaching frames.

third_party/WebKit/public/web/WebLocalFrame.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WebLocalFrame_h
 #define WebLocalFrame_h
 
 #include "WebCompositionUnderline.h"
 #include "WebFrame.h"
 #include "WebFrameLoadType.h"
@@ skipping 114 matching lines @@
 
   // On load failure, attempts to make frame's parent rendering fallback content
   // and stop this frame loading.
   virtual bool maybeRenderFallbackContent(const WebURLError&) const = 0;
 
   // Navigation State -------------------------------------------------------
 
   // Returns true if the current frame's load event has not completed.
   virtual bool isLoading() const = 0;
 
-  // Returns true if the current frame is detaching/detached. crbug.com/654654
-  virtual bool isFrameDetachedForSpecialOneOffStopTheCrashingHackBug561873()
-      const = 0;
-
   // Returns true if there is a pending redirect or location change
   // within specified interval (in seconds). This could be caused by:
   // * an HTTP Refresh header
   // * an X-Frame-Options header
   // * the respective http-equiv meta tags
   // * window.location value being mutated
   // * CSP policy block
   // * reload
   // * form submission
   virtual bool isNavigationScheduledWithin(double intervalInSeconds) const = 0;
@@ skipping 305 matching lines @@
   // to call these on a WebLocalFrame.
   bool isWebLocalFrame() const override = 0;
   WebLocalFrame* toWebLocalFrame() override = 0;
   bool isWebRemoteFrame() const override = 0;
   WebRemoteFrame* toWebRemoteFrame() override = 0;
 };
 
 }  // namespace blink
 
 #endif  // WebLocalFrame_h