Reorder the initialization of wallpapers and secondary display.

ash/shell.cc

Index: ash/shell.cc
diff --git a/ash/shell.cc b/ash/shell.cc
index ebfa9ebcdb5e8f667bb1017806815e6d8f72e58f..a28be5142fcb575b393195ced613032c9ab57f88 100644
--- a/ash/shell.cc
+++ b/ash/shell.cc
@@ -484,15 +484,17 @@ void Shell::Init() {
   // Force Layout
   root_window_controller->root_window_layout()->OnWindowResized();
 
+  display_controller_->InitSecondaryDisplays();
+
   // It needs to be created after OnWindowResized has been called, otherwise the
-  // widget will not paint when restoring after a browser crash.
+  // widget will not paint when restoring after a browser crash.  Also it needs
+  // to be created after InitSecondaryDisplays() to initialize the wallpapers in
+  // the correct size.
   user_wallpaper_delegate_->InitializeWallpaper();
 
   power_button_controller_.reset(new PowerButtonController);
   AddShellObserver(power_button_controller_.get());
 
-  display_controller_->InitSecondaryDisplays();
-
   if (initially_hide_cursor_)
     cursor_manager_.ShowCursor(false);
 }