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

chrome/browser/safe_browsing/permission_reporter.cc

Index: chrome/browser/safe_browsing/permission_reporter.cc
diff --git a/chrome/browser/safe_browsing/permission_reporter.cc b/chrome/browser/safe_browsing/permission_reporter.cc
index fee2d359fec79990a60a5458c4382a2d4849d5d7..17cec8cd480f1bcb1fb714874238bf30ae330e45 100644
--- a/chrome/browser/safe_browsing/permission_reporter.cc
+++ b/chrome/browser/safe_browsing/permission_reporter.cc
@@ -52,6 +52,8 @@ PermissionReport::PermissionType PermissionTypeForReport(
       return PermissionReport::BACKGROUND_SYNC;
     case PermissionType::FLASH:
       return PermissionReport::FLASH;
+    case PermissionType::SENSORS:
+    // TODO(riju): as of now nothing
     case PermissionType::NUM:
       break;
   }