Remove WebContentsObserver::ProvisionalChangeToMainFrameUrl and all the code supporting it.

content/browser/frame_host/navigation_controller_impl_unittest.cc

 // 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.
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/stl_util.h"
@@ skipping 1019 matching lines @@
   controller.LoadURLWithParams(load_url_params);
   EXPECT_EQ(0U, notifications.size());
   EXPECT_EQ(-1, controller.GetPendingEntryIndex());
   EXPECT_TRUE(controller.GetPendingEntry());
   EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
   EXPECT_EQ(0, delegate->navigation_state_change_count());
 
   // The visible entry should be the last committed URL, not the pending one.
   EXPECT_EQ(kExistingURL, controller.GetVisibleEntry()->GetURL());
 
-  // Now the navigation redirects.
+  // Now the navigation redirects. (There is no corresponding message here.)
   const GURL kRedirectURL("http://foo/see");
-  main_test_rfh()->OnMessageReceived(
-      FrameHostMsg_DidRedirectProvisionalLoad(0,  // routing_id
-                                              -1,  // pending page_id
-                                              kNewURL,  // old url
-                                              kRedirectURL));  // new url
 
   // We don't want to change the NavigationEntry's url, in case it cancels.
   // Prevents regression of http://crbug.com/77786.
   EXPECT_EQ(kNewURL, controller.GetPendingEntry()->GetURL());
 
   // It may abort before committing, if it's a download or due to a stop or
   // a new navigation from the user.
   FrameHostMsg_DidFailProvisionalLoadWithError_Params params;
   params.error_code = net::ERR_ABORTED;
   params.error_description = base::string16();
@@ skipping 3303 matching lines @@
   params.post_id = -1;
   test_rvh()->SendNavigateWithParams(&params);
 
   // Now reload. replaceState overrides the POST, so we should not show a
   // repost warning dialog.
   controller_impl().Reload(true);
   EXPECT_EQ(0, delegate->repost_form_warning_count());
 }
 
 }  // namespace content