Remove dead extensions tracking code.

extensions/browser/runtime_data.h

 // Copyright 2014 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 EXTENSIONS_BROWSER_RUNTIME_DATA_H_
 #define EXTENSIONS_BROWSER_RUNTIME_DATA_H_
 
 #include <map>
 #include <string>
 
@@ skipping 23 matching lines @@
   // non-persistent (lazy), we consider it to be ready.
   bool IsBackgroundPageReady(const Extension* extension) const;
   void SetBackgroundPageReady(const std::string& extension_id, bool value);
 
   // Getter and setter for the flag that specifies whether the extension is
   // being upgraded.
   // For these purposes, a reload counts as an upgrade.
   bool IsBeingUpgraded(const std::string& extension_id) const;
   void SetBeingUpgraded(const std::string& extension_id, bool value);
 
-  // Getter and setter for the flag that specifies if the extension has used
-  // the webrequest API.
-  bool HasUsedWebRequest(const std::string& extension_id) const;
-  void SetHasUsedWebRequest(const std::string& extension_id, bool value);
-
   // Returns true if the extension is being tracked. Used only for testing.
   bool HasExtensionForTesting(const std::string& extension_id) const;
 
   // Erase runtime data for all extensions. Used only for testing. Cannot be
   // named ClearAllForTesting due to false-positive presubmit errors.
   void ClearAll();
 
   // ExtensionRegistryObserver overrides. Public for testing.
   void OnExtensionUnloaded(content::BrowserContext* browser_context,
                            const Extension* extension,
                            UnloadedExtensionInfo::Reason reason) override;
 
  private:
   // Bitmasks for runtime states.
   enum RuntimeFlag {
     // Set if the background page is ready.
     BACKGROUND_PAGE_READY = 1 << 0,
     // Set while the extension is being upgraded.
     BEING_UPGRADED        = 1 << 1,
-    // Set if the extension has used the webRequest API.
-    HAS_USED_WEBREQUEST   = 1 << 2,
   };
 
   // The mask of any data that should persist across the extension being
   // unloaded.
   static const int kPersistAcrossUnloadMask = BEING_UPGRADED;
 
   // Returns the setting for the flag or false if the extension isn't found.
   bool HasFlag(const std::string& extension_id, RuntimeFlag flag) const;
 
   // Sets |flag| for |extension| to |value|. Adds |extension| to the list of
   // extensions if it isn't present.
   void SetFlag(const std::string& extension_id, RuntimeFlag flag, bool value);
 
   // Map from extension ID to the RuntimeFlags bits.
   typedef std::map<std::string, int> ExtensionFlagsMap;
   ExtensionFlagsMap extension_flags_;
 
   ExtensionRegistry* registry_;  // Not owned.
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_RUNTIME_DATA_H_