Remove search::ShouldPrerenderInstantUrlOnOmniboxFocus

chrome/browser/search/search.cc

 // Copyright 2012 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/search/search.h"
 
 #include <stddef.h>
 
 #include "base/command_line.h"
 #include "base/feature_list.h"
@@ skipping 34 matching lines @@
 #endif
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/login/signin/merge_session_throttling_utils.h"
 #endif  // defined(OS_CHROMEOS)
 
 namespace search {
 
 namespace {
 
-const char kPrerenderInstantUrlOnOmniboxFocus[] =
-    "prerender_instant_url_on_omnibox_focus";
-
 // Controls whether to use the alternate Instant search base URL. This allows
 // experimentation of Instant search.
 const char kUseAltInstantURL[] = "use_alternate_instant_url";
 const char kUseSearchPathForInstant[] = "use_search_path_for_instant";
 const char kAltInstantURLPath[] = "search";
 const char kAltInstantURLQueryParams[] = "&qbp=1";
 
 // Status of the New Tab URL for the default Search provider. NOTE: Used in a
 // UMA histogram so values should only be added at the end and not reordered.
 enum NewTabURLState {
@@ skipping 442 matching lines @@
 }
 
 GURL GetNewTabPageURL(Profile* profile) {
   return NewTabURLDetails::ForProfile(profile).url;
 }
 
 GURL GetSearchResultPrefetchBaseURL(Profile* profile) {
   return ShouldPrefetchSearchResults() ? GetInstantURL(profile, true) : GURL();
 }
 
-bool ShouldPrerenderInstantUrlOnOmniboxFocus() {
-  if (!ShouldPrefetchSearchResults())
-    return false;
-
-  FieldTrialFlags flags;
-  return GetFieldTrialInfo(&flags) && GetBoolValueForFlagWithDefault(
-      kPrerenderInstantUrlOnOmniboxFocus, false, flags);
-}
-
 GURL GetEffectiveURLForInstant(const GURL& url, Profile* profile) {
   CHECK(ShouldAssignURLToInstantRenderer(url, profile))
       << "Error granting Instant access.";
 
   if (url.SchemeIs(chrome::kChromeSearchScheme))
     return url;
 
   // Replace the scheme with "chrome-search:", and clear the port, since
   // chrome-search is a scheme without port.
   url::Replacements<char> replacements;
@@ skipping 77 matching lines @@
       kUseAltInstantURL, false, flags);
 }
 
 bool ShouldUseSearchPathForInstant() {
   FieldTrialFlags flags;
   return GetFieldTrialInfo(&flags) && GetBoolValueForFlagWithDefault(
       kUseSearchPathForInstant, false, flags);
 }
 
 }  // namespace search