[i18n] renderer plugins change i18n-content to $i18n{}

This is a mechanical change to convert i18n-content to $i18n{} tags.

BUG=677338

Review-Url: https://codereview.chromium.org/2628093002
Cr-Commit-Position: refs/heads/master@{#443064}

chrome/renderer/resources/plugins/blocked_plugin.html

@@ -28,7 +28,7 @@
     <div i18n-values="title:name" id="outer">
       <img class="icon"
            src="../../../../ui/webui/resources/images/extension.svg">
-      <h1 id="message" i18n-content="message"></h1>
+      <h1 id="message">$i18n{message}</h1>
     </div>
   </body>
 </html>

chrome/renderer/resources/plugins/disabled_plugin.html

@@ -21,7 +21,7 @@
     <div i18n-values="title:name" id="outer">
       <img class="icon"
            src="../../../../ui/webui/resources/images/extension.svg">
-      <h1 id="message" i18n-content="message"></h1>
+      <h1 id="message">$i18n{message}</h1>
       <div id="enable_link">
         <a href="#" onclick="plugin.openAboutPlugins();">chrome://plugins</a>
       </div>

chrome/renderer/resources/plugins/prefer_html_plugin.html

@@ -26,7 +26,7 @@
   <div i18n-values="title:name" id="outer">
     <img class="icon"
          src="../../../../ui/webui/resources/images/extension.svg">
-    <h1 id="message" i18n-content="message"></h1>
+    <h1 id="message">$i18n{message}</h1>
   </div>
   <script>
     window.onkeydown = function(e) {