Enable prefetch-search-results on Desktop Chrome by default.

chrome/browser/search/instant_service_unittest.cc

 // Copyright 2013 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 <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/field_trial.h"
 #include "base/strings/string_util.h"
@@ skipping 43 matching lines @@
     instant_service_->OnOmniboxStartMarginChanged(start_margin);
   }
 
   scoped_ptr<MockInstantServiceObserver> instant_service_observer_;
 };
 
 class InstantServiceEnabledTest : public InstantServiceTest {
  protected:
   virtual void SetUp() OVERRIDE {
     ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
-        "EmbeddedSearch", "Group1 use_cacheable_ntp:1 prefetch_results:1"));
+        "EmbeddedSearch", "Group1 use_cacheable_ntp:1"));
     InstantServiceTest::SetUp();
   }
 };
 
 TEST_F(InstantServiceEnabledTest, DispatchDefaultSearchProviderChanged) {
   EXPECT_CALL(*instant_service_observer_.get(), DefaultSearchProviderChanged())
       .Times(1);
 
   const std::string new_base_url = "https://bar.com/";
   SetUserSelectedDefaultSearchProvider(new_base_url);
@@ skipping 34 matching lines @@
   ChromeViewMsg_SetSearchURLs::Param params;
   ChromeViewMsg_SetSearchURLs::Read(msg, &params);
   std::vector<GURL> search_urls = params.a;
   GURL new_tab_page_url = params.b;
   EXPECT_EQ(2U, search_urls.size());
   EXPECT_EQ("https://www.google.com/alt#quux=", search_urls[0].spec());
   EXPECT_EQ("https://www.google.com/url?bar=", search_urls[1].spec());
   EXPECT_EQ("https://www.google.com/newtab", new_tab_page_url.spec());
 }
 
-TEST_F(InstantServiceTest, InstantSearchDisabled) {
-  // 'prefetch_results' flag is not enabled in field trials. Make sure
-  // InstantSearchPrerenderer is not initialized.
-  EXPECT_EQ(static_cast<InstantSearchPrerenderer*>(NULL),
+TEST_F(InstantServiceTest, InstantSearchEnabled) {
+  EXPECT_NE(static_cast<InstantSearchPrerenderer*>(NULL),
             GetInstantSearchPrerenderer());
 }
 
 TEST_F(InstantServiceEnabledTest,
        ResetInstantSearchPrerenderer_DefaultProviderChanged) {
   EXPECT_CALL(*instant_service_observer_.get(), DefaultSearchProviderChanged())
       .Times(2);
 
   // Set a default search provider that doesn't support Instant.
   TemplateURLData data;
@@ skipping 25 matching lines @@
   NotifyGoogleBaseURLUpdate(new_base_url);
   EXPECT_NE(old_prerenderer, GetInstantSearchPrerenderer());
 }
 
 TEST_F(InstantServiceTest, OmniboxStartMarginChanged) {
   int new_start_margin = 92;
   EXPECT_CALL(*instant_service_observer_.get(),
               OmniboxStartMarginChanged(new_start_margin)).Times(1);
   UpdateOmniboxStartMargin(new_start_margin);
 }