Revert 152059 - Gradient overlay for constrained window

chrome/renderer/webview_animating_overlay.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_RENDERER_WEBVIEW_ANIMATING_OVERLAY_H_
-#define CHROME_RENDERER_WEBVIEW_ANIMATING_OVERLAY_H_
-
-#include "base/compiler_specific.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebPageOverlay.h"
-#include "ui/base/animation/animation_delegate.h"
-#include "ui/base/animation/linear_animation.h"
-
-namespace content {
-class RenderView;
-}
-
-// This class draws a gradient on a PageOverlay of a WebView. The gradient
-// fades in when shown and fades out when hidden.
-class WebViewAnimatingOverlay : public WebKit::WebPageOverlay,
-                                public ui::AnimationDelegate {
- public:
-  enum State {
-    ANIMATING_IN,
-    VISIBLE,
-    ANIMATING_OUT,
-    HIDDEN
-  };
-
-  explicit WebViewAnimatingOverlay(content::RenderView* render_view);
-  virtual ~WebViewAnimatingOverlay();
-  void Show();
-  void Hide();
-
-  State state() { return state_; }
-
-  // WebKit::WebPageOverlay implementation:
-  virtual void paintPageOverlay(WebKit::WebCanvas* canvas) OVERRIDE;
-
-  // ui::AnimationDelegate implementation:
-  virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE;
-  virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE;
-
- private:
-  int GetCurrentAlpha();
-
-  content::RenderView* render_view_;
-  State state_;
-  ui::LinearAnimation animation_;
-
-  DISALLOW_COPY_AND_ASSIGN(WebViewAnimatingOverlay);
-};
-
-#endif  // CHROME_RENDERER_WEBVIEW_ANIMATING_OVERLAY_H_