Hold cros_component_installers in browser_process.

chrome/browser/browser_process_impl.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/browser_process_impl.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <map>
@@ skipping 961 matching lines @@
   if (!pnacl_component_installer_) {
     pnacl_component_installer_ =
         new component_updater::PnaclComponentInstaller();
   }
   return pnacl_component_installer_.get();
 #else
   return nullptr;
 #endif
 }
 
+#if defined(OS_CHROMEOS)
+component_updater::DefaultComponentInstaller*
+BrowserProcessImpl::cros_component_installer(
+    const std::string& name,
+    std::unique_ptr<component_updater::ComponentInstallerTraits>
+        installer_traits) {
+  auto it = cros_component_installers_.find(name);
+  if (it == cros_component_installers_.end()) {
+    cros_component_installers_[name] =
+        new component_updater::DefaultComponentInstaller(
+            std::move(installer_traits));
+  }
+  return cros_component_installers_[name].get();
+}
+#endif
+
 component_updater::SupervisedUserWhitelistInstaller*
 BrowserProcessImpl::supervised_user_whitelist_installer() {
   if (!supervised_user_whitelist_installer_) {
     supervised_user_whitelist_installer_ =
         component_updater::SupervisedUserWhitelistInstaller::Create(
             component_updater(),
             &profile_manager()->GetProfileAttributesStorage(),
             local_state());
   }
   return supervised_user_whitelist_installer_.get();
@@ skipping 429 matching lines @@
 }
 
 void BrowserProcessImpl::OnAutoupdateTimer() {
   if (CanAutorestartForUpdate()) {
     DLOG(WARNING) << "Detected update.  Restarting browser.";
     RestartBackgroundInstance();
   }
 }
 
 #endif  // (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)