Remove XHTML leftovers from the viewer HTML files

web/viewer-snippet-firefox-extension.html

@@ -1,4 +1,4 @@
 <!-- This snippet is used in the Firefox extension (included from viewer.html) -->
-<base href="resource://pdf.js/web/" />
+<base href="resource://pdf.js/web/">
 <script src="l10n.js"></script>
 <script src="../build/pdf.js"></script>

web/viewer-snippet-minified.html

@@ -1,3 +1,3 @@
 <!-- This snippet is used in production (included from viewer.html) -->
-<link rel="resource" type="application/l10n" href="locale/locale.properties"/>
+<link rel="resource" type="application/l10n" href="locale/locale.properties">
 <script src="pdf.viewer.js"></script>

web/viewer-snippet.html

@@ -1,4 +1,4 @@
 <!-- This snippet is used in production (included from viewer.html) -->
-<link rel="resource" type="application/l10n" href="locale/locale.properties"/>
+<link rel="resource" type="application/l10n" href="locale/locale.properties">
 <script src="l10n.js"></script>
 <script src="../build/pdf.js"></script>

web/viewer.html

@@ -39,9 +39,9 @@ See https://github.com/adobe-type-tools/cmap-resources
 <!--#include viewer-snippet-chrome-extension.html-->
 <!--#endif-->
 
-    <link rel="stylesheet" href="viewer.css"/>
+    <link rel="stylesheet" href="viewer.css">
 <!--#if !PRODUCTION-->
-    <link rel="resource" type="application/l10n" href="locale/locale.properties"/>
+    <link rel="resource" type="application/l10n" href="locale/locale.properties">
 <!--#endif-->
 
 <!--#if !(MOZCENTRAL || CHROME || MINIFIED)-->
@@ -332,7 +332,7 @@ See https://github.com/adobe-type-tools/cmap-resources
             </div>
             <div class="row">
               <!-- The type="password" attribute is set via script, to prevent warnings in Firefox for all http:// documents. -->
-              <input id="password" class="toolbarField" />
+              <input id="password" class="toolbarField">
             </div>
             <div class="buttonRow">
               <button id="passwordCancel" class="overlayButton"><span data-l10n-id="password_cancel">Cancel</span></button>