Declare behaviors with @polymerBehavior

This makes polymer lint happy.

Change-Id: If7808d901635bfa9b0757ab9bf57257808cf1ce0

polygerrit-ui/app/behaviors/gr-tooltip-behavior/gr-tooltip-behavior.js

diff --git a/polygerrit-ui/app/behaviors/gr-tooltip-behavior/gr-tooltip-behavior.js b/polygerrit-ui/app/behaviors/gr-tooltip-behavior/gr-tooltip-behavior.js
index dc0854a..b176466 100644
--- a/polygerrit-ui/app/behaviors/gr-tooltip-behavior/gr-tooltip-behavior.js
+++ b/polygerrit-ui/app/behaviors/gr-tooltip-behavior/gr-tooltip-behavior.js
@@ -16,6 +16,7 @@
 
   var BOTTOM_OFFSET = 10;
 
+  /** @polymerBehavior Gerrit.TooltipBehavior */
   var TooltipBehavior = {
 
     properties: {

polygerrit-ui/app/behaviors/keyboard-shortcut-behavior.html

diff --git a/polygerrit-ui/app/behaviors/keyboard-shortcut-behavior.html b/polygerrit-ui/app/behaviors/keyboard-shortcut-behavior.html
index 4250ce2..17acac8 100644
--- a/polygerrit-ui/app/behaviors/keyboard-shortcut-behavior.html
+++ b/polygerrit-ui/app/behaviors/keyboard-shortcut-behavior.html
@@ -18,6 +18,7 @@
 (function(window) {
   'use strict';
 
+  /** @polymerBehavior Gerrit.KeyboardShortcutBehavior */
   var KeyboardShortcutBehavior = {
     enabled: true,
 

polygerrit-ui/app/behaviors/rest-client-behavior.html

diff --git a/polygerrit-ui/app/behaviors/rest-client-behavior.html b/polygerrit-ui/app/behaviors/rest-client-behavior.html
index c515664..08b25db 100644
--- a/polygerrit-ui/app/behaviors/rest-client-behavior.html
+++ b/polygerrit-ui/app/behaviors/rest-client-behavior.html
@@ -18,6 +18,8 @@
 (function(window) {
   'use strict';
 
+
+  /** @polymerBehavior Gerrit.RESTClientBehavior */
   var RESTClientBehavior = {
     ChangeDiffType: {
       ADDED: 'ADDED',