Hook up SetInstantPreviewHeight for ChromeOS.

chrome/browser/ui/gtk/browser_window_gtk.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_GTK_BROWSER_WINDOW_GTK_H_
 #define CHROME_BROWSER_UI_GTK_BROWSER_WINDOW_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include <string>
@@ skipping 138 matching lines @@
       const content::NativeWebKeyboardEvent& event,
       bool* is_keyboard_shortcut) OVERRIDE;
   virtual void HandleKeyboardEvent(
       const content::NativeWebKeyboardEvent& event) OVERRIDE;
   virtual void ShowCreateChromeAppShortcutsDialog(
       Profile* profile,
       const extensions::Extension* app) OVERRIDE;
   virtual void Cut() OVERRIDE;
   virtual void Copy() OVERRIDE;
   virtual void Paste() OVERRIDE;
-  virtual void ShowInstant(TabContents* preview) OVERRIDE;
+  virtual void ShowInstant(TabContents* preview,
+                           int height,
+                           InstantSizeUnits units) OVERRIDE;
   virtual void HideInstant() OVERRIDE;
   virtual gfx::Rect GetInstantBounds() OVERRIDE;
   virtual bool IsInstantTabShowing() OVERRIDE;
   virtual WindowOpenDisposition GetDispositionForPopupBounds(
       const gfx::Rect& bounds) OVERRIDE;
   virtual FindBar* CreateFindBar() OVERRIDE;
   virtual void ShowAvatarBubble(content::WebContents* web_contents,
                                 const gfx::Rect& rect) OVERRIDE;
   virtual void ShowAvatarBubbleFromAvatarButton() OVERRIDE;
   virtual void ShowPasswordGenerationBubble(
@@ skipping 391 matching lines @@
   scoped_ptr<FullscreenExitBubbleGtk> fullscreen_exit_bubble_;
 
   FullscreenExitBubbleType fullscreen_exit_bubble_type_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserWindowGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_BROWSER_WINDOW_GTK_H_