Introduce --cancel-first-run and reduce the strength of --no-first-run.

chrome/browser/first_run/first_run.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/first_run/first_run.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
@@ skipping 464 matching lines @@
 bool IsChromeFirstRun() {
   if (internal::first_run_ != internal::FIRST_RUN_UNKNOWN)
     return internal::first_run_ == internal::FIRST_RUN_TRUE;
 
   internal::first_run_ = internal::FIRST_RUN_FALSE;
 
   base::FilePath first_run_sentinel;
   const CommandLine* command_line = CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(switches::kForceFirstRun)) {
     internal::first_run_ = internal::FIRST_RUN_TRUE;
-  } else if (command_line->HasSwitch(switches::kNoFirstRun)) {
+  } else if (command_line->HasSwitch(switches::kCancelFirstRun)) {
     internal::first_run_ = internal::FIRST_RUN_CANCEL;

[grt (UTC plus 2), 2013/07/30 02:48:16]

FIRST_RUN_CANCEL doesn't seem to exist in the repo. is this CR based on
un-committed code?

[gab, 2013/07/30 12:58:54]

Ah, yes, can't sneak anything by you ;)! Based on
https://codereview.chromium.org/20743002/

-  } else if (internal::GetFirstRunSentinelFilePath(&first_run_sentinel) &&
+  } else if (!command_line->HasSwitch(switches::kSkipFirstRun) &&
+             internal::GetFirstRunSentinelFilePath(&first_run_sentinel) &&
              !base::PathExists(first_run_sentinel)) {
     internal::first_run_ = internal::FIRST_RUN_TRUE;
   }
 
   return internal::first_run_ == internal::FIRST_RUN_TRUE;
 }
 
 void CreateSentinelIfNeeded() {
   if (IsChromeFirstRun() ||
       internal::first_run_ == internal::FIRST_RUN_CANCEL) {
@@ skipping 278 matching lines @@
   SetShouldDoPersonalDataManagerFirstRun();
 
   internal::DoPostImportPlatformSpecificTasks(profile);
 }
 
 uint16 auto_import_state() {
   return g_auto_import_state;
 }
 
 }  // namespace first_run