Always show x-webkit-speech icon for ease of testing.

chrome/test/data/extensions/platform_apps/web_view/speech/guest.html

Index: chrome/test/data/extensions/platform_apps/web_view/speech/guest.html
diff --git a/chrome/test/data/extensions/platform_apps/web_view/speech/guest.html b/chrome/test/data/extensions/platform_apps/web_view/speech/guest.html
index 4714d7ed5778b6f0feedae32f9aebd728dae75c1..bc0a65308a943cd73559aa9078de64724e0fe431 100644
--- a/chrome/test/data/extensions/platform_apps/web_view/speech/guest.html
+++ b/chrome/test/data/extensions/platform_apps/web_view/speech/guest.html
@@ -14,6 +14,12 @@
       <input id='speechInput' x-webkit-speech style="width: 10px;">
     </div>
   </div>
+  <style>
+  input::-webkit-input-speech-button {
+    opacity: 1;
+    pointer-events: auto;
+  }
+  </style>
   <script>
     var speechInputElement = document.getElementById('speechInput');
     var onSpeechInputChanged = function() {