Add a preference for why an extension is disabled.

chrome/browser/extensions/extension_prefs.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_PREFS_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_H_
 #pragma once
 
 #include <set>
 #include <string>
@@ skipping 53 matching lines @@
     LAUNCH_REGULAR,
     LAUNCH_FULLSCREEN,
     LAUNCH_WINDOW,
 
     // Launch an app in the in the way a click on the NTP would,
     // if no user pref were set.  Update this constant to change
     // the default for the NTP and chrome.management.launchApp().
     LAUNCH_DEFAULT = LAUNCH_REGULAR
   };
 
+  // Used to record the reason an extension was disabled.
+  enum DisableReason {
+    DISABLE_UNKNOWN,
+    DISABLE_USER_ACTION,
+    DISABLE_PERMISSIONS_INCREASE,
+    DISABLE_RELOAD,
+  };
+
   // Does not assume ownership of |prefs| and |extension_pref_value_map|.
   // Note that you must call Init() to finalize construction.
   ExtensionPrefs(PrefService* prefs,
                  const FilePath& root_dir,
                  ExtensionPrefValueMap* extension_pref_value_map);
   virtual ~ExtensionPrefs();
 
   // If |extensions_disabled| is true, extension controlled preferences and
   // content settings do not become effective.
   void Init(bool extensions_disabled);
@@ skipping 48 matching lines @@
   void SetBrowserActionVisibility(const Extension* extension, bool visible);
 
   // Did the extension ask to escalate its permission during an upgrade?
   bool DidExtensionEscalatePermissions(const std::string& id);
 
   // If |did_escalate| is true, the preferences for |extension| will be set to
   // require the install warning when the user tries to enable.
   void SetDidExtensionEscalatePermissions(const Extension* extension,
                                           bool did_escalate);
 
+  // Getter and setter for disabled reason.
+  DisableReason GetDisableReason(const std::string& extension_id);
+  void SetDisableReason(const std::string& extension_id,
+                        DisableReason disable_reason);
+
   // Returns the version string for the currently installed extension, or
   // the empty string if not found.
   std::string GetVersionString(const std::string& extension_id);
 
   // Re-writes the extension manifest into the prefs.
   // Called to change the extension's manifest when it's re-localized.
   void UpdateManifest(const Extension* extension);
 
   // Returns extension path based on extension ID, or empty FilePath on error.
   FilePath GetExtensionPath(const std::string& extension_id);
@@ skipping 352 matching lines @@
   // Contains all the logic for handling the order for various extension
   // properties.
   scoped_ptr<ExtensionSorting> extension_sorting_;
 
   scoped_refptr<ExtensionContentSettingsStore> content_settings_store_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionPrefs);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_H_