Control easy unlock by a field trial.

chrome/browser/extensions/component_loader.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/extensions/component_loader.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/metrics/field_trial.h"
 #include "base/path_service.h"
 #include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/signin/easy_unlock.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/plugin_service.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/file_util.h"
 #include "extensions/common/id_util.h"
 #include "extensions/common/manifest_constants.h"
@@ skipping 560 matching lines @@
     Add(IDR_GOOGLE_NOW_MANIFEST,
         base::FilePath(FILE_PATH_LITERAL("google_now")));
   }
 #endif
 
 #if defined(GOOGLE_CHROME_BUILD)
 #if !defined(OS_CHROMEOS)  // http://crbug.com/314799
   AddNetworkSpeechSynthesisExtension();
 #endif
 
-  if (!skip_session_components &&
-      command_line->HasSwitch(switches::kEnableEasyUnlock)) {
+  if (!skip_session_components && easy_unlock::IsEnabled()) {
     if (command_line->HasSwitch(switches::kEasyUnlockAppPath)) {
       base::FilePath easy_unlock_path(
           command_line->GetSwitchValuePath(switches::kEasyUnlockAppPath));

[Alexei Svitkine (slow), 2014/07/22 18:18:40]

Hmm, what happens if its enabled via field trial but no path is specified on
non-cros?

[Tim Song, 2014/07/22 18:36:09]

No component app will be installed in this case.

[xiyuan, 2014/07/22 20:00:23]

The non-cros release plan is still unclear ATM. Cros is the current interesting
platform. The code is in common part because there are WIP on win/mac.

       Add(IDR_EASY_UNLOCK_MANIFEST, easy_unlock_path);
     } else {
 #if defined(OS_CHROMEOS)
       Add(IDR_EASY_UNLOCK_MANIFEST,
           base::FilePath(
               FILE_PATH_LITERAL("/usr/share/chromeos-assets/easy_unlock")));
 #endif
     }
   }
 #endif  // defined(GOOGLE_CHROME_BUILD)
@@ skipping 36 matching lines @@
         off_the_record_context, Extension::GetBaseURLFromExtensionId(id));
     fileapi::FileSystemContext* file_system_context =
         content::BrowserContext::GetStoragePartitionForSite(
             off_the_record_context, site)->GetFileSystemContext();
     file_system_context->EnableTemporaryFileSystemInIncognito();
   }
 #endif
 }
 
 }  // namespace extensions