PlzNavigate: make content unit tests work with browser side navigation

content/browser/frame_host/render_frame_host_impl.h

 // Copyright 2013 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 CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 227 matching lines @@
 
   // Tells the renderer that this RenderFrame is being swapped out for one in a
   // different renderer process.  It should run its unload handler and move to
   // a blank document.  If |proxy| is not null, it should also create a
   // RenderFrameProxy to replace the RenderFrame and set it to |is_loading|
   // state. The renderer should preserve the RenderFrameProxy object until it
   // exits, in case we come back.  The renderer can exit if it has no other
   // active RenderFrames, but not until WasSwappedOut is called.
   void SwapOut(RenderFrameProxyHost* proxy, bool is_loading);
 
-  bool is_waiting_for_beforeunload_ack() const {
-    return is_waiting_for_beforeunload_ack_;
-  }
+  // Whether an ongoing navigation is waiting for a BeforeUnload ACK from the
+  // RenderFrame. Currently this only happens in cross-site navigations.
+  // PlzNavigate: this happens in every browser-initiated navigation that is not
+  // same-page.
+  bool IsWaitingForBeforeUnloadACK() const;
 
   // Whether the RFH is waiting for an unload ACK from the renderer.
   bool IsWaitingForUnloadACK() const;
 
   // Called when either the SwapOut request has been acknowledged or has timed
   // out.
   void OnSwappedOut();
 
   // Whether this RenderFrameHost has been swapped out, such that the frame is
   // now rendered by a RenderFrameHost in a different process.
@@ skipping 366 matching lines @@
 
   // NOTE: This must be the last member.
   base::WeakPtrFactory<RenderFrameHostImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_