Rework the way Widget::Init works:

chrome/browser/chromeos/login/message_bubble.cc

Index: chrome/browser/chromeos/login/message_bubble.cc
===================================================================
--- chrome/browser/chromeos/login/message_bubble.cc	(revision 82649)
+++ chrome/browser/chromeos/login/message_bubble.cc	(working copy)
@@ -20,14 +20,13 @@
 static const int kBorderSize = 4;
 static const int kMaxLabelWidth = 250;
 
-MessageBubble::MessageBubble(views::WidgetGtk::Type type,
-                             views::Widget* parent,
+MessageBubble::MessageBubble(views::Widget* parent,
                              SkBitmap* image,
                              const std::wstring& text,
                              const std::wstring& help,
                              bool grab_enabled,
                              MessageBubbleDelegate* delegate)
-    : Bubble(type, false),  // don't show while screen is locked
+    : Bubble(false),  // don't show while screen is locked
       parent_(parent),
       help_link_(NULL),
       message_delegate_(delegate),
@@ -112,8 +111,8 @@
                                    const std::wstring& help,
                                    MessageBubbleDelegate* delegate) {
   // The bubble will be destroyed when it is closed.
-  MessageBubble* bubble = new MessageBubble(
-      views::WidgetGtk::TYPE_WINDOW, parent, image, text, help, true, delegate);
+  MessageBubble* bubble = new MessageBubble(parent, image, text, help, true,
+                                            delegate);
   bubble->InitBubble(parent, position_relative_to, arrow_location,
                      bubble->text_->parent(), delegate);
   return bubble;
@@ -129,8 +128,8 @@
     const std::wstring& help,
     MessageBubbleDelegate* delegate) {
   // The bubble will be destroyed when it is closed.
-  MessageBubble* bubble = new MessageBubble(
-      views::WidgetGtk::TYPE_CHILD, parent, image, text, help, false, delegate);
+  MessageBubble* bubble = new MessageBubble(parent, image, text, help, false,
+                                            delegate);
   bubble->InitBubble(parent, position_relative_to, arrow_location,
                      bubble->text_->parent(), delegate);
   return bubble;