Various fixes and UI improvements.

* Added executable icon to list view rows.
* Use the actual module executable name instead of argv[0] (fixes issue
  when running not through the shortcut)
* Fixes some button anchoring behavior.
* Moved the command to the Debug menu instead of Tools menu.

BUG=305760

Review URL: https://codereview.chromium.org/27183010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229941 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229941