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"
 
 class TabContents;
 
 namespace gfx {
 class Rect;
 }
 
 // InstantController calls these methods on its delegate (Browser, via
 // BrowserInstantController) to ask for the Instant preview to be shown,
 // hidden, etc. In the following methods, if a TabContents argument is
 // explicitly supplied, the delegate MUST use it. Otherwise, the preview
 // TabContents can be gotten by calling InstantController::GetPreviewContents()
 // (note that it may return NULL).
 class InstantControllerDelegate {
  public:
-  // Show the preview.
-  virtual void ShowInstant() = 0;
+  // Show the preview with the given |height|.
+  virtual void ShowInstant(int height, InstantSizeUnits units) = 0;
 
   // Hide any preview currently being shown.
   virtual void HideInstant() = 0;
 
   // Commit the |preview| by merging it into the active tab. Delegate takes
   // ownership of |preview|.
   virtual void CommitInstant(TabContents* preview) = 0;
 
   // Autocomplete the Instant suggested |text| into the omnibox, using the
   // specified |behavior| (see instant_types.h for details).
   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;
 
   // 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_