Cleanup: Remove for_search param from search::InstantExtendedEnabledParam()

components/search/search_unittest.cc

 // Copyright 2014 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/search/search.h"
 
 #include <memory>
 
 #include "base/memory/ptr_util.h"
 #include "base/metrics/field_trial.h"
@@ skipping 147 matching lines @@
   EXPECT_TRUE(IsInstantExtendedAPIEnabled());
   EXPECT_EQ("ion=1&", ForceInstantResultsParam(true));
   EXPECT_EQ(std::string(), ForceInstantResultsParam(false));
 }
 
 typedef EmbeddedSearchFieldTrialTest InstantExtendedEnabledParamTest;
 
 TEST_F(InstantExtendedEnabledParamTest, QueryExtractionDisabled) {
   ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial("EmbeddedSearch",
                                                      "Group1 espv:12"));
-  // Make sure InstantExtendedEnabledParam() returns an empty string for search
-  // requests.
-  EXPECT_EQ("", InstantExtendedEnabledParam(true));
-  EXPECT_EQ("espv=12&", InstantExtendedEnabledParam(false));
+  EXPECT_EQ("espv=12&", InstantExtendedEnabledParam());
 }
 
 TEST_F(InstantExtendedEnabledParamTest, UseDefaultEmbeddedSearchPageVersion) {
   ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
       "EmbeddedSearch", "Group1 espv:-1"));
-  EXPECT_EQ("", InstantExtendedEnabledParam(true));
-  EXPECT_EQ("espv=2&", InstantExtendedEnabledParam(false));
+  EXPECT_EQ("espv=2&", InstantExtendedEnabledParam());
 }
 
 #endif  // !defined(OS_IOS) && !defined(OS_ANDROID)
 
 }  // namespace search