Interpret '?' and Ctrl-K or Ctrl-E as putting omnibox in keyword search mode for Default Search Pro…

components/omnibox/browser/builtin_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 "components/omnibox/browser/builtin_provider.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 
@@ skipping 11 matching lines @@
     : AutocompleteProvider(AutocompleteProvider::TYPE_BUILTIN),
       client_(client) {
   builtins_ = client_->GetBuiltinURLs();
 }
 
 void BuiltinProvider::Start(const AutocompleteInput& input,
                             bool minimal_changes) {
   matches_.clear();
   if (input.from_omnibox_focus() ||
       (input.type() == metrics::OmniboxInputType::INVALID) ||
-      (input.type() == metrics::OmniboxInputType::FORCED_QUERY) ||
       (input.type() == metrics::OmniboxInputType::QUERY))
     return;
 
   const size_t kAboutSchemeLength = strlen(url::kAboutScheme);
   const base::string16 kAbout =
       base::ASCIIToUTF16(url::kAboutScheme) +
       base::ASCIIToUTF16(url::kStandardSchemeSeparator);
   const base::string16 embedderAbout =
       base::UTF8ToUTF16(client_->GetEmbedderRepresentationOfAboutScheme()) +
       base::ASCIIToUTF16(url::kStandardSchemeSeparator);
@@ skipping 97 matching lines @@
                                const ACMatchClassifications& styles) {
   AutocompleteMatch match(this, kRelevance, false,
                           AutocompleteMatchType::NAVSUGGEST);
   match.fill_into_edit = match_string;
   match.inline_autocompletion = inline_completion;
   match.destination_url = GURL(match_string);
   match.contents = match_string;
   match.contents_class = styles;
   matches_.push_back(match);
 }