Control easy unlock by a field trial.

chrome/browser/extensions/component_loader.cc

Index: chrome/browser/extensions/component_loader.cc
diff --git a/chrome/browser/extensions/component_loader.cc b/chrome/browser/extensions/component_loader.cc
index 20d08009a2e3cbf2ce88a64753f6a7e87242f462..c05815a60ef294992172f500a87617a45c6cc42b 100644
--- a/chrome/browser/extensions/component_loader.cc
+++ b/chrome/browser/extensions/component_loader.cc
@@ -12,6 +12,7 @@
 #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"
@@ -592,8 +593,7 @@ void ComponentLoader::AddDefaultComponentExtensionsWithBackgroundPages(
   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.