Adds the page for hotword-only to the opt-in flow.

chrome/browser/resources/hotword_audio_verification/steps/hotword_only_step.html

Index: chrome/browser/resources/hotword_audio_verification/steps/hotword_only_step.html
diff --git a/chrome/browser/resources/hotword_audio_verification/steps/hotword_only_step.html b/chrome/browser/resources/hotword_audio_verification/steps/hotword_only_step.html
index 8df25af7cec9703895160b3d70d9f39f52bd6730..08897198176885bbcd15dcca8336511f0ff77f03 100644
--- a/chrome/browser/resources/hotword_audio_verification/steps/hotword_only_step.html
+++ b/chrome/browser/resources/hotword_audio_verification/steps/hotword_only_step.html
@@ -1,2 +1,40 @@
 <div id="hotword-only-container" hidden>
+  <div class="mic"></div>
+  <div class="container">
+    <div class="header">
+      <span class="close"></span>
+      <div class="header-text">
+        <h1>Voice search at any time</h1>
+        <h2>Say 'Ok Google' any time your screen is on</h2>
+      </div>
+    </div>
+    <div id="ho-training" class="content">
+      <h4>Let's train your Chromebook</h4>
+      <div class="col-2">
+        <br>
+        To help Google respond to you and for reliable and easy access to
+        voice search, you need to teach Google the sound of your voice.
+        <br>
+        <h4>Just say 'Ok Google' three times</h4>
+      </div>
+      <div class="col-spacing"></div>
+      <div class="col-2">
+        <div class="train listening">
+          <span class="icon"></span>
+          <span class="text">Say 'Ok Google'</span>
+        </div>
+        <div class="train not-started">
+          <span class="icon"></span>
+          <span class="text">Say 'Ok Google' again</span>
+        </div>
+        <div class="train not-started">
+          <span class="icon"></span>
+          <span class="text">Say 'Ok Google' one last time</span>
+        </div>
+      </div>
+    </div>
+    <div class="buttonbar">
+      <button id="ho-cancel-button">CANCEL</button>
+    </div>
+  </div>
 </div>