Minimal support for OOBE/login for chrome-athena

chrome/browser/chromeos/login/login_utils.cc

Index: chrome/browser/chromeos/login/login_utils.cc
diff --git a/chrome/browser/chromeos/login/login_utils.cc b/chrome/browser/chromeos/login/login_utils.cc
index 8c4f23010d3249b5d018046fef3e15f8d8d7a67a..e046ef6e63f483144307a10d6a0ccb99d2d061a2 100644
--- a/chrome/browser/chromeos/login/login_utils.cc
+++ b/chrome/browser/chromeos/login/login_utils.cc
@@ -90,6 +90,11 @@
 #include "net/url_request/url_request_context_getter.h"
 #include "url/gurl.h"
 
+#if defined(USE_ATHENA)
+#include "athena/extensions/public/extensions_delegate.h"
+#include "athena/main/athena_launcher.h"
+#endif
+
 using content::BrowserThread;
 
 namespace {
@@ -289,6 +294,16 @@ void LoginUtilsImpl::DoBrowserLaunchInternal(Profile* profile,
   chrome::startup::IsFirstRun first_run = first_run::IsChromeFirstRun() ?
       chrome::startup::IS_FIRST_RUN : chrome::startup::IS_NOT_FIRST_RUN;
 
+#if defined(USE_ATHENA)
+  {
+    // Athena virtual keyboard initialization require file IO.
+    base::ThreadRestrictions::ScopedAllowIO allow_io;

[oshima, 2014/09/04 16:14:28]

I think we need to move VK initialization to env.

bshe@, how are we dealing with VK in login screen in touch view mode now?
Are we using login profile first then switch to user profile somehow?

[bshe, 2014/09/04 18:36:52]

VK is currently initialized in ash (see
https://code.google.com/p/chromium/codesearch/#chromium/src/ash/shell.cc&rcl=...)

We use the login profile first and once real user login, the vk will reload
(https://code.google.com/p/chromium/codesearch/#chromium/src/ash/shell.cc&rcl=...)

[Dmitry Polukhin, 2014/09/05 15:05:00]

It seems that ash doing something different because it doesn't use 
keyboard::InitializeWebUIBindings() that makes file IO. I recreate keyboard
inside session with session profile but it is not enough + found bunch of
circular dependencies in VK destruction, continue investigation.

[bshe, 2014/09/05 15:15:42]

VK for athena is totally different as athena doesn't have extension available.
But VK is part of an IME extension.
+sadrul who added the webui version of VK.

On 2014/09/05 15:05:00, Dmitry Polukhin wrote:

[sadrul, 2014/09/06 02:58:12]

For athena_main, the keyboard is initialized before the UI message-loop runs,
and so it's not necessary to use ScopedAllowIO. There may be other code in the
athena initialization that expects that the message-loop isn't running yet. So
it would be good if we can initialize athena from inside chrome before the
message-loop starts running.

+
+    athena::ExtensionsDelegate::CreateExtensionsDelegateForChrome(profile);
+    athena::StartAthenaSessionWithContext(profile);
+  }
+#endif
+
   browser_creator.LaunchBrowser(*CommandLine::ForCurrentProcess(),
                                 profile,
                                 base::FilePath(),