Boot transition v2.

a. Show login webUI as soon as possible (don't wait for wallpaper animation to finish).
b. Use different type of animation tween.
c. NOT increasing wallpaper animation time from 1s to 2s as it turns out that slows down login webUI even with a. (profiling is needed)

BUG=141988

Review URL: https://codereview.chromium.org/10938013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@157535 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index ee0d90f..3751805 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -828,6 +828,13 @@
     SINGLE_VALUE_TYPE(switches::kDisableBootAnimation),
   },
   {
+    "disable-boot-animation2",
+    IDS_FLAGS_DISABLE_BOOT_ANIMATION2,
+    IDS_FLAGS_DISABLE_BOOT_ANIMATION2_DESCRIPTION,
+    kOsCrOS,
+    SINGLE_VALUE_TYPE(ash::switches::kAshDisableBootAnimation2),
+  },
+  {
     "disable-workspace2",
     IDS_FLAGS_DISABLE_WORKSPACE2,
     IDS_FLAGS_DISABLE_WORKSPACE2_DESCRIPTION,