Implement a simple Extension App Omnibox provider.

chrome/browser/autocomplete/autocomplete.cc

 // Copyright (c) 2011 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/autocomplete.h"
 
 #include <algorithm>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/i18n/number_formatting.h"
 #include "base/metrics/histogram.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/autocomplete/autocomplete_controller_delegate.h"
 #include "chrome/browser/autocomplete/autocomplete_match.h"
 #include "chrome/browser/autocomplete/builtin_provider.h"
+#include "chrome/browser/autocomplete/extension_app_provider.h"
 #include "chrome/browser/autocomplete/history_contents_provider.h"
 #include "chrome/browser/autocomplete/history_quick_provider.h"
 #include "chrome/browser/autocomplete/history_url_provider.h"
 #include "chrome/browser/autocomplete/keyword_provider.h"
 #include "chrome/browser/autocomplete/search_provider.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #include "chrome/browser/external_protocol_handler.h"
 #include "chrome/browser/net/url_fixer_upper.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 762 matching lines @@
           switches::kEnableHistoryQuickProvider) &&
       !CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableHistoryQuickProvider))
     providers_.push_back(new HistoryQuickProvider(this, profile));
   if (!CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kDisableHistoryURLProvider))
     providers_.push_back(new HistoryURLProvider(this, profile));
   providers_.push_back(new KeywordProvider(this, profile));
   providers_.push_back(new HistoryContentsProvider(this, profile));
   providers_.push_back(new BuiltinProvider(this, profile));
+  providers_.push_back(new ExtensionAppProvider(this, profile));
   for (ACProviders::iterator i(providers_.begin()); i != providers_.end(); ++i)
     (*i)->AddRef();
 }
 
 AutocompleteController::~AutocompleteController() {
   // The providers may have tasks outstanding that hold refs to them.  We need
   // to ensure they won't call us back if they outlive us.  (Practically,
   // calling Stop() should also cancel those tasks and make it so that we hold
   // the only refs.)  We also don't want to bother notifying anyone of our
   // result changes here, because the notification observer is in the midst of
@@ skipping 170 matching lines @@
     }
   }
   done_ = true;
 }
 
 void AutocompleteController::StartExpireTimer() {
   if (result_.HasCopiedMatches())
     expire_timer_.Start(base::TimeDelta::FromMilliseconds(kExpireTimeMS),
                         this, &AutocompleteController::ExpireCopiedEntries);
 }