Add a chrome://nacl page to show if NaCl is enabled and if PNaCl is installed.

chrome/browser/resources/about_nacl.js

Index: chrome/browser/resources/about_nacl.js
diff --git a/chrome/browser/resources/about_nacl.js b/chrome/browser/resources/about_nacl.js
new file mode 100644
index 0000000000000000000000000000000000000000..4e43db3fe8b2ed4372068eaf185ca13d77bcb5fc
--- /dev/null
+++ b/chrome/browser/resources/about_nacl.js
@@ -0,0 +1,36 @@
+var nacl = nacl || {};

[James Hawkins, 2012/08/11 19:21:07]

This is still dangerous in that these methods may overwrite anything in the
previously-existing nacl namespace.  This should be an anonymous namespace.

[jvoung (off chromium), 2012/08/13 22:15:43]

Sorry a bit of a JS noob, so may be doing it wrong.  Did what seemed closest to
an anonymous namespace for most of the functions.  I need to expose the
returnNaClInfo function as a callback in the nacl_ui.cc code, so left that
alone.

+
+/**
+ * Takes the |moduleListData| input argument which represents data about
+ * the currently available modules and populates the html jstemplate
+ * with that data. It expects an object structure like the above.
+ * @param {Object} moduleListData Information about available modules
+ */
+nacl.renderTemplate = function(moduleListData) {
+  // Process the template.
+  var input = new JsEvalContext(moduleListData);
+  var output = $('naclInfoTemplate');
+  jstProcess(input, output);
+};
+
+/**
+ * Asks the C++ NaClUIDOMHandler to get details about the NaCl and return
+ * the data in returnNaClInfo() (below).
+ */
+nacl.requestNaClInfo = function() {
+  chrome.send('requestNaClInfo');
+};
+
+/**
+ * Called by the WebUI to re-populate the page with data representing the
+ * current state of NaCl.
+ * @param {Object} moduleListData Information about available modules
+ */
+nacl.returnNaClInfo = function(moduleListData) {
+  $('loading-message').hidden = 'hidden';
+  $('body-container').hidden = '';
+  nacl.renderTemplate(moduleListData);
+};
+
+// Get data and have it displayed upon loading.
+document.addEventListener('DOMContentLoaded', nacl.requestNaClInfo);