s/\bArc\b/ARC/g for ARC related code.

chrome/browser/chromeos/arc/arc_session_manager.cc

 // Copyright 2016 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/chromeos/arc/arc_session_manager.h"
 
 #include <utility>
 
 #include "ash/common/shelf/shelf_delegate.h"
 #include "ash/common/wm_shell.h"
@@ skipping 581 matching lines @@
 void ArcSessionManager::StopAndEnableArc() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   DCHECK(!arc_session_runner_->IsStopped());
   reenable_arc_ = true;
   StopArc();
 }
 
 void ArcSessionManager::StartArc() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
-  // Arc must be started only if no pending data removal request exists.
+  // ARC must be started only if no pending data removal request exists.
   DCHECK(!profile_->GetPrefs()->GetBoolean(prefs::kArcDataRemoveRequested));
 
   arc_start_time_ = base::Time::Now();
 
   provisioning_reported_ = false;
 
   arc_session_runner_->RequestStart();
   SetState(State::ACTIVE);
 }
 
@@ skipping 377 matching lines @@
 
 #undef MAP_STATE
 
   // Some compilers report an error even if all values of an enum-class are
   // covered exhaustively in a switch statement.
   NOTREACHED() << "Invalid value " << static_cast<int>(state);
   return os;
 }
 
 }  // namespace arc