Remove unused / unnecessary stuff from Instant.

chrome/browser/instant/instant_loader_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_LOADER_DELEGATE_H_
-#define CHROME_BROWSER_INSTANT_INSTANT_LOADER_DELEGATE_H_
-
-#include <vector>
-
-#include "chrome/common/instant_types.h"
-
-class InstantLoader;
-
-// InstantLoader calls these methods on its delegate (InstantController)
-// to notify it of interesting events happening on the Instant preview.
-class InstantLoaderDelegate {
- public:
-  // Invoked when the loader has suggested text.
-  virtual void SetSuggestions(
-      InstantLoader* loader,
-      const std::vector<InstantSuggestion>& suggestions) = 0;
-
-  // Commit the preview.
-  virtual void CommitInstantLoader(InstantLoader* loader) = 0;
-
-  // Request that the preview be shown.
-  virtual void ShowInstantPreview(InstantLoader* loader,
-                                  InstantShownReason reason,
-                                  int height,
-                                  InstantSizeUnits units) = 0;
-
-  // Notification that the first page load (of the Instant URL) completed.
-  virtual void InstantLoaderPreviewLoaded(InstantLoader* loader) = 0;
-
-  // Notification when the loader has determined whether or not the page
-  // supports the Instant API.
-  virtual void InstantSupportDetermined(InstantLoader* loader,
-                                        bool supports_instant) = 0;
-
-  // Notification that the loader swapped a different TabContents into the
-  // preview, usually because a prerendered page was navigated to.
-  virtual void SwappedTabContents(InstantLoader* loader) = 0;
-
-  // Notification that the preview gained focus, usually due to the user
-  // clicking on it.
-  virtual void InstantLoaderContentsFocused(InstantLoader* loader) = 0;
-
- protected:
-  virtual ~InstantLoaderDelegate() {}
-};
-
-#endif  // CHROME_BROWSER_INSTANT_INSTANT_LOADER_DELEGATE_H_