Hook up SetInstantPreviewHeight for ChromeOS.

chrome/browser/instant/instant_controller_delegate.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_INSTANT_INSTANT_CONTROLLER_DELEGATE_H_
 #define CHROME_BROWSER_INSTANT_INSTANT_CONTROLLER_DELEGATE_H_
 
 #include "base/string16.h"
 #include "chrome/common/instant_types.h"
 
@@ skipping 26 matching lines @@
   virtual void SetSuggestedText(const string16& text,
                                 InstantCompleteBehavior behavior) = 0;
 
   // Return the bounds that the preview is placed at, in screen coordinates.
   virtual gfx::Rect GetInstantBounds() = 0;
 
   // Notification that the preview gained focus, usually due to the user
   // clicking on it.
   virtual void InstantPreviewFocused() = 0;
 
+  // Resize the Instant preview to the given |height|, interpreting the height
+  // to be in the given |units| (see instant_types.h for details).
+  virtual void SetInstantPreviewHeight(int height, InstantSizeUnits units) = 0;
+
   // Return the currently active tab, over which any preview would be shown.
   virtual TabContents* GetActiveTabContents() const = 0;
 
  protected:
   virtual ~InstantControllerDelegate() {}
 };
 
 #endif  // CHROME_BROWSER_INSTANT_INSTANT_CONTROLLER_DELEGATE_H_