Replace "nested message loop" with "nested run loop" in comments.

chrome/browser/autocomplete/search_provider_unittest.cc

 // Copyright 2012 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 "components/omnibox/browser/search_provider.h"
 
 #include <stddef.h>
 
 #include <string>
 
@@ skipping 174 matching lines @@
                              AutocompleteMatch* match);
 
   // Looks for a match in |provider_| with destination |url|.  Sets |match| to
   // it if found.  Returns whether |match| was set.
   bool FindMatchWithDestination(const GURL& url, AutocompleteMatch* match);
 
   // AutocompleteProviderListener:
   // If we're waiting for the provider to finish, this exits the message loop.
   void OnProviderUpdate(bool updated_matches) override;
 
-  // Runs a nested message loop until provider_ is done. The message loop is
+  // Runs a nested run loop until provider_ is done. The message loop is
   // exited by way of OnProviderUpdate.
   void RunTillProviderDone();
 
   // Invokes Start on provider_, then runs all pending tasks.
   void QueryForInput(const base::string16& text,
                      bool prevent_inline_autocomplete,
                      bool prefer_keyword);
 
   // Calls QueryForInput(), finishes any suggest query, then if |wyt_match| is
   // non-NULL, sets it to the "what you typed" entry for |text|.
@@ skipping 3431 matching lines @@
   EXPECT_TRUE(fetcher);
   // Even if the fetcher returns results, we should still have no suggestions
   // (though the provider should now be done).
   fetcher->set_response_code(200);
   fetcher->SetResponseString(R"(["",["a", "b"],[],[],{}])");
   fetcher->delegate()->OnURLFetchComplete(fetcher);
   RunTillProviderDone();
   EXPECT_TRUE(provider_->done());
   EXPECT_TRUE(provider_->matches().empty());
 }