Update ConstrainedWindowViews appearance according to mock

ui/views/controls/message_box_view.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_VIEWS_CONTROLS_MESSAGE_BOX_VIEW_H_
 #define UI_VIEWS_CONTROLS_MESSAGE_BOX_VIEW_H_
 
 #include <vector>
 
 #include "base/string16.h"
@@ skipping 29 matching lines @@
   };
 
   struct VIEWS_EXPORT InitParams {
     explicit InitParams(const string16& message);
     ~InitParams();
 
     uint16 options;
     string16 message;
     string16 default_prompt;
     int message_width;
+    int top_inset;
+    int bottom_inset;
+    int left_inset;
+    int right_inset;
+    int inter_row_vertical_spacing;
   };
 
   explicit MessageBoxView(const InitParams& params);
 
   virtual ~MessageBoxView();
 
   // Returns the text box.
   views::Textfield* text_box() { return prompt_field_; }
 
   // Returns user entered data in the prompt field.
@@ skipping 43 matching lines @@
 
   // Icon displayed in the upper left corner of the message box.
   ImageView* icon_;
 
   // Checkbox for the message box.
   Checkbox* checkbox_;
 
   // Maximum width of the message label.
   int message_width_;
 
+  // Insets for the grid layout.
+  int top_inset_;
+  int bottom_inset_;
+  int left_inset_;
+  int right_inset_;
+
+  // Spacing between rows in the grid layout.
+  int inter_row_vertical_spacing_;
+
   DISALLOW_COPY_AND_ASSIGN(MessageBoxView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_MESSAGE_BOX_VIEW_H_