Prerender: NoStatePrefetch browser side changes.

chrome/browser/prerender/prerender_field_trial.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/prerender/prerender_field_trial.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "chrome/browser/prerender/prerender_manager.h"
 #include "chrome/common/chrome_switches.h"
 
 namespace prerender {
 
 void ConfigurePrerender(const base::CommandLine& command_line) {
   PrerenderManager::PrerenderManagerMode mode =
       PrerenderManager::PRERENDER_MODE_ENABLED;
   if (command_line.HasSwitch(switches::kPrerenderMode)) {
     const std::string switch_value =
         command_line.GetSwitchValueASCII(switches::kPrerenderMode);
 
     if (switch_value == switches::kPrerenderModeSwitchValueDisabled) {
       mode = PrerenderManager::PRERENDER_MODE_DISABLED;
+    } else if (switch_value == switches::kPrerenderModeSwitchValuePrefetch) {
+      mode = PrerenderManager::PRERENDER_MODE_NOSTATE_PREFETCH;
     } else if (switch_value.empty() ||
                switch_value == switches::kPrerenderModeSwitchValueEnabled) {
       // The empty string means the option was provided with no value, and that
       // means enable.
       mode = PrerenderManager::PRERENDER_MODE_ENABLED;
     } else {
       mode = PrerenderManager::PRERENDER_MODE_DISABLED;
       LOG(ERROR) << "Invalid --prerender option received on command line: "
                  << switch_value;
       LOG(ERROR) << "Disabling prerendering!";
@@ skipping 24 matching lines @@
       return false;
 
     DCHECK_EQ(switches::kPrerenderFromOmniboxSwitchValueAuto, switch_value);
   }
 
   return (base::FieldTrialList::FindFullName("PrerenderFromOmnibox") !=
           "OmniboxPrerenderDisabled");
 }
 
 }  // namespace prerender