Add a URL param to indicate group selection in Instant field trial.

chrome/browser/search_engines/search_provider_install_data.h

 // 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.
 
 #ifndef CHROME_BROWSER_SEARCH_ENGINES_SEARCH_PROVIDER_INSTALL_DATA_H_
 #define CHROME_BROWSER_SEARCH_ENGINES_SEARCH_PROVIDER_INSTALL_DATA_H_
 #pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/weak_ptr.h"
 #include "base/task_queue.h"
 #include "chrome/browser/webdata/web_data_service.h"
 
 class GURL;
 class NotificationSource;
+class Profile;
 class SearchHostToURLsMap;
 class Task;
 class TemplateURL;
 
 // Provides the search provider install state for the I/O thread. It works by
 // loading the data on demand (when CallWhenLoaded is called) and then throwing
 // away the results after the callbacks are done, so the results are always up
 // to date with what is in the database.
 class SearchProviderInstallData : public WebDataServiceConsumer,
     public base::SupportsWeakPtr<SearchProviderInstallData> {
  public:
   enum State {
     // The search provider is not installed.
     NOT_INSTALLED = 0,
 
     // The search provider is in the user's set but is not
     INSTALLED_BUT_NOT_DEFAULT = 1,
 
     // The search provider is set as the user's default.
     INSTALLED_AS_DEFAULT = 2
   };
 
   // |ui_death_notification| and |ui_death_source| indentify a notification that
   // may be observed on the UI thread to know when this class no longer needs to
   // be kept up to date. (Note that this class may be deleted before or after
   // that notification occurs. It doesn't matter.)
   SearchProviderInstallData(WebDataService* web_service,
                             int ui_death_notification,
-                            const NotificationSource& ui_death_source);
+                            const NotificationSource& ui_death_source,
+                            Profile* profile);
   virtual ~SearchProviderInstallData();
 
   // Use to determine when the search provider information is loaded. The
   // callback may happen synchronously or asynchronously. This takes ownership
   // of |task|. There is no need to do anything special to make it function
   // (as it just relies on the normal I/O thread message loop).
   void CallWhenLoaded(Task* task);
 
   // Returns the search provider install state for the given origin.
   // This should only be called while a task is called back from CallWhenLoaded.
@@ skipping 39 matching lines @@
   // The security origin for the default search provider.
   std::string default_search_origin_;
 
   // The google base url.
   std::string google_base_url_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchProviderInstallData);
 };
 
 #endif  // CHROME_BROWSER_SEARCH_ENGINES_SEARCH_PROVIDER_INSTALL_DATA_H_