Enable spare RenderProcessHost to be preinitialized.

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 3141 matching lines @@
      flag_descriptions::kSpannableInlineAutocompleteName,
      flag_descriptions::kSpannableInlineAutocompleteDescription, kOsAndroid,
      FEATURE_VALUE_TYPE(chrome::android::kSpannableInlineAutocomplete)},
 #endif  // defined(OS_ANDROID)
 
     {"enable-resource-load-scheduler",
      flag_descriptions::kResourceLoadSchedulerName,
      flag_descriptions::kResourceLoadSchedulerDescription, kOsAll,
      FEATURE_VALUE_TYPE(features::kResourceLoadScheduler)},
 
+#if defined(OS_ANDROID)
+    {"omnibox-spare-renderer", flag_descriptions::kOmniboxSpareRendererName,
+     flag_descriptions::kOmniboxSpareRendererDescription, kOsAndroid,
+     FEATURE_VALUE_TYPE(chrome::android::kOmniboxSpareRenderer)},
+#endif
+
 #if defined(TOOLKIT_VIEWS)
     {"delay-reload-stop-button-change",
      flag_descriptions::kDelayReloadStopButtonChangeName,
      flag_descriptions::kDelayReloadStopButtonChangeDescription,
      kOsCrOS | kOsWin | kOsLinux,
      SINGLE_DISABLE_VALUE_TYPE(switches::kDelayReloadStopButtonChange)},
 #endif  // TOOLKIT_VIEWS
 
     // NOTE: Adding new command-line switches requires adding corresponding
     // entries to enum "LoginCustomFlags" in histograms/enums.xml. See note in
@@ skipping 217 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags