Extract kArcEnabled preference from ArcSessionManager part 1.

chrome/browser/ui/webui/options/chromeos/storage_manager_handler.cc

Index: chrome/browser/ui/webui/options/chromeos/storage_manager_handler.cc
diff --git a/chrome/browser/ui/webui/options/chromeos/storage_manager_handler.cc b/chrome/browser/ui/webui/options/chromeos/storage_manager_handler.cc
index 0484306873b2b00cb0385c97e1d572f39b09961d..411fe5e784e8e7c8c994c3fbea630905e050ca74 100644
--- a/chrome/browser/ui/webui/options/chromeos/storage_manager_handler.cc
+++ b/chrome/browser/ui/webui/options/chromeos/storage_manager_handler.cc
@@ -22,7 +22,6 @@
 #include "chrome/browser/browsing_data/browsing_data_indexed_db_helper.h"
 #include "chrome/browser/browsing_data/browsing_data_local_storage_helper.h"
 #include "chrome/browser/browsing_data/browsing_data_service_worker_helper.h"
-#include "chrome/browser/chromeos/arc/arc_session_manager.h"
 #include "chrome/browser/chromeos/arc/arc_util.h"
 #include "chrome/browser/chromeos/drive/file_system_util.h"
 #include "chrome/browser/chromeos/file_manager/path_util.h"
@@ -415,9 +414,8 @@ void StorageManagerHandler::UpdateArcSize() {
   updating_arc_size_ = true;
 
   Profile* const profile = Profile::FromWebUI(web_ui());
-  if (!arc::IsArcAllowedForProfile(profile) ||
-      arc::IsArcOptInVerificationDisabled() ||
-      !arc::ArcSessionManager::Get()->IsArcPlayStoreEnabled()) {
+  if (!arc::IsArcPlayStoreEnabledForProfile(profile) ||

[hidehiko, 2017/02/17 15:07:19]

Note: IsArcAllowedForProfile is no longer needed here, because
IsArcPlayStoreEnabledForProfile() contains it.

+      arc::IsArcOptInVerificationDisabled()) {

[Yusuke Sato, 2017/02/17 22:27:09]

Mostly OT: do you know why this check is necessary? code comment?

[hidehiko, 2017/02/20 18:18:44]

I'm guessing we'd like to show the section only when ARC is running.
Let me confirm with the original author. At the moment, as this is off-topic,
let me work on it in a following CL soon.

     return;
   }