Refactor Extension initialization logic. Add tracing and additional histogram.

chrome/browser/extensions/extension_service.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 482 matching lines @@
   void OnBlacklistUpdated() override;
 
   // Similar to FinishInstallation, but first checks if there still is an update
   // pending for the extension, and makes sure the extension is still idle.
   void MaybeFinishDelayedInstallation(const std::string& extension_id);
 
   // For the extension in |version_path| with |id|, check to see if it's an
   // externally managed extension.  If so, uninstall it.
   void CheckExternalUninstall(const std::string& id);
 
+  // Attempt to enable all disabled extensions which the only disabled reason is
+  // reloading.
+  void EnabledReloadableExtensions();
+
+  // Finish install (if possible) of extensions that were still delayed while
+  // the browser was shut down.
+  void MaybeFinishShutdownDelayed();
+
   // Populates greylist_.
   void LoadGreylistFromPrefs();
 
   // Signals *ready_ and sends a notification to the listeners.
   void SetReadyAndNotifyListeners();
 
   // Returns true if all the external extension providers are ready.
   bool AreAllExternalProvidersReady() const;
 
   // Called once all external providers are ready. Checks for unclaimed
@@ skipping 241 matching lines @@
                            GreylistUnknownDontChange);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            ManagementPolicyProhibitsEnableOnInstalled);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            BlockAndUnblockBlacklistedExtension);
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionService);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_