Set zero-suggest-redirect-to-chrome flag to be available for all platforms.

chrome/browser/about_flags.cc

 // Copyright (c) 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/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 2604 matching lines @@
     {"enable-touch-support-for-screen-magnifier",
      flag_descriptions::kEnableTouchSupportForScreenMagnifierName,
      flag_descriptions::kEnableTouchSupportForScreenMagnifierDescription,
      kOsCrOS,
      SINGLE_VALUE_TYPE(
          chromeos::switches::kEnableTouchSupportForScreenMagnifier)},
 #endif  // OS_CHROMEOS
 
     {"enable-zero-suggest-redirect-to-chrome",
      flag_descriptions::kEnableZeroSuggestRedirectToChromeName,
-     flag_descriptions::kEnableZeroSuggestRedirectToChromeDescription,
-     kOsDesktop, FEATURE_VALUE_TYPE(omnibox::kZeroSuggestRedirectToChrome)},
+     flag_descriptions::kEnableZeroSuggestRedirectToChromeDescription, kOsAll,
+     FEATURE_VALUE_TYPE(omnibox::kZeroSuggestRedirectToChrome)},
     {"new-omnibox-answer-types", flag_descriptions::kNewOmniboxAnswerTypesName,
      flag_descriptions::kNewOmniboxAnswerTypesDescription, kOsAll,
      FEATURE_VALUE_TYPE(omnibox::kNewOmniboxAnswerTypes)},
 
 #if defined(OS_CHROMEOS) || defined(OS_LINUX) || defined(OS_MACOSX) || \
     defined(OS_WIN)
     {"omnibox-entity-suggestions",
      flag_descriptions::kOmniboxEntitySuggestionsName,
      flag_descriptions::kOmniboxEntitySuggestionsDescription, kOsDesktop,
      FEATURE_VALUE_TYPE(omnibox::kOmniboxEntitySuggestions)},
@@ skipping 346 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags