MD Settings: implement "RESTART" button for hardware acceleration to take effect

chrome/browser/resources/settings/system_page/system_page.js

Index: chrome/browser/resources/settings/system_page/system_page.js
diff --git a/chrome/browser/resources/settings/system_page/system_page.js b/chrome/browser/resources/settings/system_page/system_page.js
index cd9c667e3a7ab727b52c19d095613969df9f6b1d..088f928e5ca968b5687183b3ba2fa7c331ffa5cf 100644
--- a/chrome/browser/resources/settings/system_page/system_page.js
+++ b/chrome/browser/resources/settings/system_page/system_page.js
@@ -11,19 +11,30 @@ Polymer({
   is: 'settings-system-page',
 
   properties: {
-    /** @type {settings.SystemPageDelegate} */
-    delegate: {
-      type: Object,
-    },
-
     prefs: {
       type: Object,
       notify: true,
     },
   },
 
+  /**
+   * @param {boolean} enabled Whether hardware acceleration is currently
+   *     enabled.
+   * @private
+   */
+  shouldShowRestart_: function(enabled) {
+    var proxy = settings.SystemPageBrowserProxyImpl.getInstance();
+    return enabled != proxy.wasHardwareAccelerationEnabledAtStartup();
+  },
+
   /** @private */
   onChangeProxySettingsTap_: function() {
-    this.delegate.changeProxySettings();
+    settings.SystemPageBrowserProxyImpl.getInstance().changeProxySettings();
+  },
+
+  /** @private */
+  onRestartTap_: function() {
+    // TODO(dbeam): we should prompt before restarting the browser.
+    settings.SystemPageBrowserProxyImpl.getInstance().restartBrowser();
   },
 });