Instant: Use only one hidden WebContents per profile.

chrome/browser/ui/views/frame/instant_preview_controller_views.h

-// Copyright 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_VIEWS_FRAME_INSTANT_PREVIEW_CONTROLLER_VIEWS_H_
-#define CHROME_BROWSER_UI_VIEWS_FRAME_INSTANT_PREVIEW_CONTROLLER_VIEWS_H_
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/memory/scoped_ptr.h"
-#include "chrome/browser/instant/instant_preview_controller.h"
-
-class Browser;
-class ContentsContainer;
-
-namespace views {
-class WebView;
-}
-
-// A controller that manages the Views-specific Instant preview. Its primary
-// role is to respond to display-state changes from the Instant model and
-// reflect this in the visibility and layout of the preview.
-class InstantPreviewControllerViews : public InstantPreviewController {
- public:
-  InstantPreviewControllerViews(Browser* browser, ContentsContainer* contents);
-  virtual ~InstantPreviewControllerViews();
-
-  views::WebView* preview() { return preview_.get(); }
-
-  views::WebView* release_preview() WARN_UNUSED_RESULT {
-    return preview_.release();
-  }
-
- private:
-  // Overridden from InstantPreviewController:
-  virtual void PreviewStateChanged(const InstantModel& model) OVERRIDE;
-
-  ContentsContainer* const contents_;
-
-  // The view that contains the Instant preview web contents.
-  scoped_ptr<views::WebView> preview_;
-
-  DISALLOW_COPY_AND_ASSIGN(InstantPreviewControllerViews);
-};
-
-#endif  // CHROME_BROWSER_UI_VIEWS_FRAME_INSTANT_PREVIEW_CONTROLLER_VIEWS_H_