ash: Display system background while loading wallpaper.

When the wallpaper takes a long time to load, areas of the
screen that aren't covered by other layers are painted
white.  This looks okay when we first boot, but not when
we're displaying the login after logging out or while we're
starting a guest session.

This makes us instead initialize SystemBackgroundController
immediately with either a #fefefe or black color depending
on whether this is the first Chrome run after boot or not.
Its color is updated to black after the login wallpaper
animation is finished.

BUG=151111,152751


Review URL: https://chromiumcodereview.appspot.com/11054005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@159822 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 5 insertions, 0 deletions

diff --git a/ash/test/test_shell_delegate.cc b/ash/test/test_shell_delegate.cc
index e690c16..0526b85 100644
--- a/ash/test/test_shell_delegate.cc
+++ b/ash/test/test_shell_delegate.cc
@@ -32,6 +32,10 @@ bool TestShellDelegate::IsSessionStarted() {
   return true;
 }
 
+bool TestShellDelegate::IsFirstRunAfterBoot() {
+  return false;
+}
+
 void TestShellDelegate::LockScreen() {
   locked_ = true;
 }
diff --git a/ash/test/test_shell_delegate.h b/ash/test/test_shell_delegate.h
index bd41219..f815d18 100644
--- a/ash/test/test_shell_delegate.h
+++ b/ash/test/test_shell_delegate.h
@@ -20,6 +20,7 @@ class TestShellDelegate : public ShellDelegate {
   // Overridden from ShellDelegate:
   virtual bool IsUserLoggedIn() OVERRIDE;
   virtual bool IsSessionStarted() OVERRIDE;
+  virtual bool IsFirstRunAfterBoot() OVERRIDE;
   virtual void LockScreen() OVERRIDE;
   virtual void UnlockScreen() OVERRIDE;
   virtual bool IsScreenLocked() const OVERRIDE;