[sensors] Add Permission guard to the generic sensor apis.

chrome/browser/safe_browsing/permission_reporter.cc

 // 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.
 
 #include "chrome/browser/safe_browsing/permission_reporter.h"
 
 #include <functional>
 
 #include "base/hash.h"
 #include "base/memory/ptr_util.h"
@@ skipping 29 matching lines @@
     case CONTENT_SETTINGS_TYPE_DURABLE_STORAGE:
       return PermissionReport::DURABLE_STORAGE;
     case CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC:
       return PermissionReport::AUDIO_CAPTURE;
     case CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA:
       return PermissionReport::VIDEO_CAPTURE;
     case CONTENT_SETTINGS_TYPE_BACKGROUND_SYNC:
       return PermissionReport::BACKGROUND_SYNC;
     case CONTENT_SETTINGS_TYPE_PLUGINS:
       return PermissionReport::FLASH;
+    case CONTENT_SETTINGS_TYPE_SENSORS:
+    // TODO(riju): as of now nothing
     default:
       break;
   }
 
   NOTREACHED();
   return PermissionReport::UNKNOWN_PERMISSION;
 }
 
 PermissionReport::Action PermissionActionForReport(PermissionAction action) {
   switch (action) {
@@ skipping 157 matching lines @@
   }
   if (log.size() < kMaximumReportsPerOriginPerPermissionPerMinute) {
     log.push(current_time);
     return false;
   } else {
     return true;
   }
 }
 
 }  // namespace safe_browsing