Settings: Add some missing assert.html imports

Add missing imports of assert.html for elements that are using assert
but not importing it currently. Also add to deps for closure compiler
for settings_idle_load. This is in preparation for autogenerating
Polymer 3 versions of these files.

Bug: 1026426
Change-Id: I22eacc796d159ff24813c1cccd5c5c9e386e7cfc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2028658
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Commit-Queue: Demetrios Papadopoulos <dpapad@chromium.org>
Auto-Submit: Rebekah Potter <rbpotter@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#736580}

chrome/browser/resources/settings/controls/BUILD.gn

@@ -90,6 +90,7 @@ js_library("settings_dropdown_menu") {
 }
 
 js_library("settings_idle_load") {
+  deps = [ "//ui/webui/resources/js:assert" ]
   externs_list = [ "$externs_path/pending_polymer.js" ]
 }
 

chrome/browser/resources/settings/controls/controlled_radio_button.html

@@ -3,6 +3,7 @@
 <link rel="import" href="chrome://resources/cr_elements/cr_radio_button/cr_radio_button_behavior.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_radio_button/cr_radio_button_style_css.html">
 <link rel="import" href="chrome://resources/cr_elements/policy/cr_policy_pref_indicator.html">
+<link rel="import" href="chrome://resources/html/assert.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-a11y-keys-behavior/iron-a11y-keys-behavior.html">
 <link rel="import" href="pref_control_behavior.html">
 <link rel="import" href="../prefs/pref_util.html">

chrome/browser/resources/settings/controls/extension_controlled_indicator.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 
 <link rel="import" href="chrome://resources/cr_elements/cr_button/cr_button.html">
+<link rel="import" href="chrome://resources/html/assert.html">
 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="../extension_control_browser_proxy.html">
 <link rel="import" href="../i18n_setup.html">

chrome/browser/resources/settings/controls/settings_dropdown_menu.html

@@ -3,6 +3,7 @@
 <link rel="import" href="chrome://resources/cr_elements/md_select_css.html">
 <link rel="import" href="chrome://resources/cr_elements/policy/cr_policy_pref_behavior.html">
 <link rel="import" href="chrome://resources/cr_elements/policy/cr_policy_pref_indicator.html">
+<link rel="import" href="chrome://resources/html/assert.html">
 <link rel="import" href="pref_control_behavior.html">
 <link rel="import" href="../i18n_setup.html">
 <link rel="import" href="../prefs/pref_util.html">

chrome/browser/resources/settings/controls/settings_idle_load.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 
+<link rel="import" href="chrome://resources/html/assert.html">
+
 <dom-module id="settings-idle-load">
   <template>
     <slot></slot>