Fix some unit_tests under PlzNavigate

content/test/test_render_frame_host.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_TEST_TEST_RENDER_FRAME_HOST_H_
 #define CONTENT_TEST_TEST_RENDER_FRAME_HOST_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 45 matching lines @@
   // RenderFrameHostTester implementation.
   void InitializeRenderFrameIfNeeded() override;
   TestRenderFrameHost* AppendChild(const std::string& frame_name) override;
   void Detach() override;
   void SimulateNavigationStart(const GURL& url) override;
   void SimulateRedirect(const GURL& new_url) override;
   void SimulateNavigationCommit(const GURL& url) override;
   void SimulateNavigationError(const GURL& url, int error_code) override;
   void SimulateNavigationErrorPageCommit() override;
   void SimulateNavigationStop() override;
+  void SimulateUnloading() override;

[clamy, 2016/08/30 23:08:38]

I'm not a big fan of the name SimulateUnloading, since
a) we simulate BeforeUnload and not Unload
b) we simulate a lot more than that in the PlzNavigate case.

I don't have a good suggestion though. I've been thinking of
PrepareForCommitIfNecessary or SimulateCommitableState (which is what the
function is attempting to do) but that doesn't sound super good.

[scottmg, 2016/08/30 23:55:30]

I went with PrepareForCommitIfNecessary(). It's not pretty, but it's at least
explanatory I guess.

   void SendNavigate(int page_id,
                     int nav_entry_id,
                     bool did_create_new_entry,
                     const GURL& url) override;
   void SendFailedNavigate(int page_id,
                           int nav_entry_id,
                           bool did_create_new_entry,
                           const GURL& url) override;
   void SendNavigateWithTransition(int page_id,
                                   int nav_entry_id,
@@ skipping 84 matching lines @@
 
   // See set_simulate_history_list_was_cleared() above.
   bool simulate_history_list_was_cleared_;
 
   DISALLOW_COPY_AND_ASSIGN(TestRenderFrameHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_TEST_TEST_RENDER_FRAME_HOST_H_