arc: Use overlay to show links from ToS.

chrome/browser/resources/chromeos/arc_support/main.html

Index: chrome/browser/resources/chromeos/arc_support/main.html
diff --git a/chrome/browser/resources/chromeos/arc_support/main.html b/chrome/browser/resources/chromeos/arc_support/main.html
index 7291c94003a9e8b04c3f2ea07276c4601a8cb202..33bc696d916612da9d9c6501f45fe27b22e61217 100644
--- a/chrome/browser/resources/chromeos/arc_support/main.html
+++ b/chrome/browser/resources/chromeos/arc_support/main.html
@@ -144,16 +144,17 @@
       </div>
     </div>
   </div>
-  <div id="learn-more-container" class="overlay" hidden>
+  <div id="overlay-container" class="overlay" hidden>
     <div class="page">
       <div class="close-button"></div>
       <div class="content-area">
         <span id="learn-more-content"></span>

[xiyuan, 2016/10/18 21:26:07]

nit: Since we are making it generic, should we update this id too:
e.g.
  learn-more-content -> overlay-text-content

[khmel, 2016/10/18 22:18:12]

Done.

+        <webview id="overlay-url"></webview>
       </div>
       <div class="action-area">
         <div class="action-area-right">
           <div class="button-strip">
-            <button id="learn-more-close" i18n-content="learnMoreClose">
+            <button id="overlay-close" i18n-content="overlayClose">
             </button>
           </div>
         </div>