Propagate the result of AmountOfFreeSpace to JS and show it in chrome://drive-internals.

chrome/browser/resources/chromeos/drive_internals.js

Index: chrome/browser/resources/chromeos/drive_internals.js
diff --git a/chrome/browser/resources/chromeos/drive_internals.js b/chrome/browser/resources/chromeos/drive_internals.js
index d9ef590b02ffc94f5e3ecbb3dfb8f064209caa17..ce30534d84d0964d0abf6070d66bfa6ba21018cf 100644
--- a/chrome/browser/resources/chromeos/drive_internals.js
+++ b/chrome/browser/resources/chromeos/drive_internals.js
@@ -69,6 +69,20 @@ function updateCacheContents(cacheEntry) {
 }
 
 /**
+ * Updates the Local Storage summary.
+ * @param {Object} localStorageSummary Dictionaty describing the status of local
+ * stogage.
+ */
+function updateLocalStorageUsage(localStorageSummary) {
+  var place_holder = $('local-storage-usage');

[satorux1, 2012/08/13 07:26:20]

placeHolder

[Haruki Sato, 2012/08/17 05:46:34]

Done. Actually, I ended up removing this temporal variable.

+
+  var freeSpaceDesc = localStorageSummary.free_space >= 0 ?
+      'Local free space: ' + localStorageSummary.free_space + ' bytes.' :
+      'Unable to check local free space.';

[satorux1, 2012/08/13 07:26:20]

chrome://drive-internals is for developers. The message doesn't have to be
friendly. It's ok to print -1 in case of an error.

Besides, it's desirable to have text messages in HTML than JS.

[Haruki Sato, 2012/08/17 05:46:34]

Done.
and now it's so simple!

+  place_holder.appendChild(createElementFromText('div', freeSpaceDesc));
+}
+
+/**
  * Creates an element named |elementName| containing the content |text|.
  * @param {string} elementName Name of the new element to be created.
  * @param {string} text Text to be contained in the new element.