Add chrome://drive-internals to the list of URLs in chrome://about

BUG=139769
TEST=manually open the page and test

Review URL: https://chromiumcodereview.appspot.com/10825095

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149795 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/browser_about_handler.cc

@@ -68,6 +68,7 @@ const char* const kChromePaths[] = {
   chrome::kChromeUICryptohomeHost,
   chrome::kChromeUIDiagnosticsHost,
   chrome::kChromeUIDiscardsHost,
+  chrome::kChromeUIDriveInternalsHost,
   chrome::kChromeUIImageBurnerHost,
   chrome::kChromeUIKeyboardOverlayHost,
   chrome::kChromeUILoginHost,