Include a URL what-you-typed option when the default search provider is not available and the input…

chrome/browser/autocomplete/history_url_provider.cc

 // Copyright (c) 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 "chrome/browser/autocomplete/history_url_provider.h"
 
 #include <algorithm>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 738 matching lines @@
           *j, i->prefix.length(), !i->num_components,
           i->num_components >= best_prefix->num_components));
     }
   }
 
   // Create sorted list of suggestions.
   CullPoorMatches(params);
   SortAndDedupMatches(&params->matches);
 
   // Try to create a shorter suggestion from the best match.
-  // We consider the what you typed match eligible for display when there's a
-  // reasonable chance the user actually cares:
-  // * Their input can be opened as a URL, and
-  // * We parsed the input as a URL, or it starts with an explicit "http:" or
-  // "https:".
-  // Otherwise, this is just low-quality noise.  In the cases where we've parsed
-  // as UNKNOWN, we'll still show an accidental search infobar if need be.
+  // We consider the what you typed match eligible for display when it's
+  // navigable and there's a reasonable chance the user intended to do
+  // something other than search.  We use a variety of heuristics to determine
+  // this, e.g. whether the user explicitly typed a scheme, or if omnibox
+  // searching has been disabled by policy. In the cases where we've parsed as
+  // UNKNOWN, we'll still show an accidental search infobar if need be.
   VisitClassifier classifier(this, params->input, db);
   params->have_what_you_typed_match =
       (params->input.type() != metrics::OmniboxInputType::QUERY) &&
       ((params->input.type() != metrics::OmniboxInputType::UNKNOWN) ||
        (classifier.type() == VisitClassifier::UNVISITED_INTRANET) ||
        !params->trim_http ||
-       (AutocompleteInput::NumNonHostComponents(params->input.parts()) > 0));
+       (AutocompleteInput::NumNonHostComponents(params->input.parts()) > 0) ||
+       !params->default_search_provider);
   const bool have_shorter_suggestion_suitable_for_inline_autocomplete =
       PromoteOrCreateShorterSuggestion(
           db, params->have_what_you_typed_match, params);
 
   // Check whether what the user typed appears in history.
   const bool can_check_history_for_exact_match =
       // Checking what_you_typed_match.is_history_what_you_typed_match tells us
       // whether SuggestExactInput() succeeded in constructing a valid match.
       params->what_you_typed_match.is_history_what_you_typed_match &&
       // Additionally, in the case where the user has typed "foo.com" and
@@ skipping 372 matching lines @@
     AutocompleteMatch::ClassifyLocationInString(base::string16::npos, 0,
         match.contents.length(), ACMatchClassification::URL,
         &match.contents_class);
   }
   match.description = info.title();
   match.description_class =
       ClassifyDescription(params.input.text(), match.description);
   RecordAdditionalInfoFromUrlRow(info, &match);
   return match;
 }