Site Settings Desktop: Implement USB devices section.

chrome/browser/ui/webui/settings/site_settings_handler.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_SETTINGS_SITE_SETTINGS_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_SETTINGS_SITE_SETTINGS_HANDLER_H_
 
 #include <vector>
 
 #include "base/scoped_observer.h"
@@ skipping 15 matching lines @@
                             public content_settings::Observer {
  public:
   explicit SiteSettingsHandler(Profile* profile);
   ~SiteSettingsHandler() override;
 
   // SettingsPageUIHandler:
   void RegisterMessages() override;
   void OnJavascriptAllowed() override;
   void OnJavascriptDisallowed() override;
 
+  // Usage info:

[dschuyler, 2016/08/12 20:58:48]

nit: it's an oddity that some comments end with ':'.
I think this comment should end in a period, because
the pattern for the colon comments is that they refer
to overridden methods of a base class.  

[Finnur, 2016/08/15 11:54:33]

Done.

   void OnGetUsageInfo(const storage::UsageInfoEntries& entries);
   void OnUsageInfoCleared(storage::QuotaStatusCode code);
 
   // content_settings::Observer:
   void OnContentSettingChanged(const ContentSettingsPattern& primary_pattern,
                                const ContentSettingsPattern& secondary_pattern,
                                ContentSettingsType content_type,
                                std::string resource_identifier) override;
  private:
   friend class SiteSettingsHandlerTest;
   FRIEND_TEST_ALL_PREFIXES(SiteSettingsHandlerTest, GetAndSetDefault);
   FRIEND_TEST_ALL_PREFIXES(SiteSettingsHandlerTest, Origins);
   FRIEND_TEST_ALL_PREFIXES(SiteSettingsHandlerTest, Patterns);
 
   // Asynchronously fetches the usage for a given origin. Replies back with
   // OnGetUsageInfo above.
   void HandleFetchUsageTotal(const base::ListValue* args);
 
   // Deletes the storage being used for a given host.
   void HandleClearUsage(const base::ListValue* args);
 
+  // Handles the request for a list of all USB devices.
+  void HandleFetchUsbDevices(const base::ListValue* args);
+
+  // Removes a particular USB device permission.
+  void HandleRemoveUsbDevice(const base::ListValue* args);
+
   // Gets and sets the default value for a particular content settings type.
   void HandleSetDefaultValueForContentType(const base::ListValue* args);
   void HandleGetDefaultValueForContentType(const base::ListValue* args);
 
   // Returns the list of site exceptions for a given content settings type.
   void HandleGetExceptionList(const base::ListValue* args);
 
   // Handles setting and resetting of an origin permission.
   void HandleResetCategoryPermissionForOrigin(const base::ListValue* args);
   void HandleSetCategoryPermissionForOrigin(const base::ListValue* args);
@@ skipping 11 matching lines @@
 
   // Change observer for content settings.
   ScopedObserver<HostContentSettingsMap, content_settings::Observer> observer_;
 
   DISALLOW_COPY_AND_ASSIGN(SiteSettingsHandler);
 };
 
 }  // namespace settings
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SETTINGS_SITE_SETTINGS_HANDLER_H_