Update ConstrainedWindowViews appearance according to mock

chrome/browser/ui/browser_window.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 CHROME_BROWSER_UI_BROWSER_WINDOW_H_
 #define CHROME_BROWSER_UI_BROWSER_WINDOW_H_
 
 #include "base/callback_forward.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/ui/base_window.h"
@@ skipping 326 matching lines @@
   // Checks if an instant's tab contents is being shown.
   virtual bool IsInstantTabShowing() = 0;
 
   // Return the correct disposition for a popup window based on |bounds|.
   virtual WindowOpenDisposition GetDispositionForPopupBounds(
       const gfx::Rect& bounds) = 0;
 
   // Construct a FindBar implementation for the |browser|.
   virtual FindBar* CreateFindBar() = 0;
 
+  // Returns the y where the top of the constrained window should be
+  // positioned.
+  virtual int GetConstrainedWindowTopY() = 0;
+
   // Invoked when the preferred size of the contents in current tab has been
   // changed. We might choose to update the window size to accomodate this
   // change.
   // Note that this won't be fired if we change tabs.
   virtual void UpdatePreferredSize(content::WebContents* web_contents,
                                    const gfx::Size& pref_size) {}
 
   // Invoked when the contents auto-resized and the container should match it.
   virtual void ResizeDueToAutoResize(content::WebContents* web_contents,
                                      const gfx::Size& new_size) {}
@@ skipping 52 matching lines @@
 
   // Returns the ToolbarView.
   virtual ToolbarView* GetToolbarView() const = 0;
 #endif
 
  protected:
   virtual ~BrowserWindowTesting() {}
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_WINDOW_H_