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

chrome/browser/instant/instant_browsertest.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 "base/command_line.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/autocomplete/autocomplete_edit.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/instant/instant_controller.h"
@@ skipping 321 matching lines @@
 
   ASSERT_EQ(ASCIIToUTF16("defghi"), location_bar_->location_entry()->GetText());
 
   // Make sure the url that will get committed when we press enter matches that
   // of the default search provider.
   const TemplateURL* default_turl =
       TemplateURLServiceFactory::GetForProfile(browser()->profile())->
       GetDefaultSearchProvider();
   ASSERT_TRUE(default_turl);
   ASSERT_TRUE(default_turl->url());
-  EXPECT_EQ(default_turl->url()->ReplaceSearchTerms(
+  EXPECT_EQ(default_turl->url()->ReplaceSearchTerms(browser()->profile(),

[Peter Kasting, 2011/08/11 00:35:17]

I tried to trace through the call chain (for GetCurrentURL()) here but failed. 
Is passing the profile here the right thing to do?

                 *default_turl, ASCIIToUTF16("defghi"), 0, string16()),
             browser()->instant()->GetCurrentURL().spec());
 
   // Check that the value is reflected and onchange is called.
   EXPECT_EQ("true 0 0 1 1 d false def false 3 3",
             GetSearchStateAsString(preview_, true));
 }
 
 // DISABLED http://crbug.com/80118
 #if defined(OS_LINUX)
@@ skipping 594 matching lines @@
   ui_test_utils::NavigateToURL(
       browser(),
       GURL(test_server()->GetURL("files/instant/empty.html")));
   bool result;
   ASSERT_TRUE(GetBoolFromJavascript(
                   browser()->GetSelectedTabContents(),
                   "window.chrome.searchBox.value.length == 0",
                   &result));
   EXPECT_TRUE(result);
 }