Modified GetMatchToPrefetch() to return a valid match for prefetching even when hide_verbatim flag i

chrome/browser/ui/omnibox/omnibox_controller.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 "chrome/browser/ui/omnibox/omnibox_controller.h"
 
 #include "base/metrics/histogram.h"
 #include "chrome/browser/autocomplete/autocomplete_classifier.h"
 #include "chrome/browser/autocomplete/autocomplete_match.h"
 #include "chrome/browser/autocomplete/search_provider.h"
@@ skipping 13 matching lines @@
 #include "extensions/common/constants.h"
 #include "ui/gfx/rect.h"
 
 namespace {
 
 // Returns the AutocompleteMatch that the InstantController should prefetch, if
 // any.
 //
 // The SearchProvider may mark some suggestions to be prefetched based on
 // instructions from the suggest server. If such a match ranks sufficiently
-// highly, we'll return it. We only care about matches that are the default or
-// else the very first entry in the dropdown (which can happen for non-default
-// matches only if we're hiding a top verbatim match); for other matches, we
-// think the likelihood of the user selecting them is low enough that
-// prefetching isn't worth doing.
+// highly, we'll return it.
+//
+// We only care about matches that are the default or the very first entry in
+// the dropdown (which can happen for non-default matches only if we're hiding
+// a top verbatim match) or the second entry in the dropdown (which can happen
+// for non-default matches when a top verbatim match is shown); for other
+// matches, we think the likelihood of the user selecting them is low enough
+// that prefetching isn't worth doing.
 const AutocompleteMatch* GetMatchToPrefetch(const AutocompleteResult& result) {
   const AutocompleteResult::const_iterator default_match(
       result.default_match());
   if (default_match == result.end())
     return NULL;
 
   if (SearchProvider::ShouldPrefetch(*default_match))
     return &(*default_match);
 
-  return (result.ShouldHideTopMatch() && (result.size() > 1) &&
-      SearchProvider::ShouldPrefetch(result.match_at(1))) ?
-          &result.match_at(1) : NULL;
+  return ((result.ShouldHideTopMatch() ||
+              result.TopMatchIsVerbatimAndHasNoConsecutiveVerbatimMatches()) &&
+          (result.size() > 1) &&
+          SearchProvider::ShouldPrefetch(result.match_at(1))) ?
+              &result.match_at(1) : NULL;
 }
 
 }  // namespace
 
 OmniboxController::OmniboxController(OmniboxEditModel* omnibox_edit_model,
                                      Profile* profile)
     : omnibox_edit_model_(omnibox_edit_model),
       profile_(profile),
       popup_(NULL),
       autocomplete_controller_(new AutocompleteController(profile, this,
@@ skipping 86 matching lines @@
     if (profile_->GetNetworkPredictor()) {
       profile_->GetNetworkPredictor()->AnticipateOmniboxUrl(
           match.destination_url,
           predictors::AutocompleteActionPredictor::IsPreconnectable(match));
     }
     // We could prefetch the alternate nav URL, if any, but because there
     // can be many of these as a user types an initial series of characters,
     // the OS DNS cache could suffer eviction problems for minimal gain.
   }
 }