Merged already reviewed CLs for r/o zip support in ChromeOS file browser:

Re-landing http://codereview.chromium.org/7457001:

Adding support for mount point different from removable
devices to MountLibrary
(work in progress..have to add GetMountPoints support)

tested on ChromeOS with these three patches: 
http://gerrit.chromium.org/gerrit/#change,4447
http://gerrit.chromium.org/gerrit/#change,4449
http://gerrit.chromium.org/gerrit/#change,4544

http://codereview.chromium.org/7471039/:

UI for mounting/unmounting archive files.

BUG=chromium-os:17673, chromium-os:17783
TEST=Made sure mounting devices still works and that MountCompleted event gets through to file_browser_event_router (checking ui and chrome logs for mount completed entries)
TBR=tbarzic, dgozman
Review URL: http://codereview.chromium.org/7488044
Review URL: http://codereview.chromium.org/7502010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@94008 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/extension_event_names.h b/chrome/browser/extensions/extension_event_names.h
index b6958e2..0b26e4f 100644
--- a/chrome/browser/extensions/extension_event_names.h
+++ b/chrome/browser/extensions/extension_event_names.h
@@ -33,6 +33,7 @@
 // FileBrowser.
 extern const char kOnFileBrowserDiskChanged[];
 extern const char kOnFileChanged[];
+extern const char kOnFileBrowserMountCompleted[];
 
 // InputMethod.
 extern const char kOnInputMethodChanged[];