Rename classes related to top controls

third_party/WebKit/Source/core/frame/TopControls.h

-// Copyright 2015 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 TopControls_h
-#define TopControls_h
-
-#include "core/CoreExport.h"
-#include "platform/heap/Handle.h"
-#include "public/platform/WebTopControlsState.h"
-
-namespace blink {
-class FrameHost;
-class FloatSize;
-
-// This class encapsulate data and logic required to show/hide top controls
-// duplicating cc::TopControlsManager behaviour.  Top controls' self-animation
-// to completion is still handled by compositor and kicks in when scrolling is
-// complete (i.e, upon ScrollEnd or FlingEnd).
-class CORE_EXPORT TopControls final : public GarbageCollected<TopControls> {
- public:
-  static TopControls* create(const FrameHost& host) {
-    return new TopControls(host);
-  }
-
-  DECLARE_TRACE();
-
-  // The amount that the viewport was shrunk by to accommodate the top
-  // controls.
-  float layoutHeight();
-  // The amount that top controls are currently shown.
-  float contentOffset();
-
-  float height() const { return m_height; }
-  bool shrinkViewport() const { return m_shrinkViewport; }
-  void setHeight(float height, bool shrinkViewport);
-
-  float shownRatio() const { return m_shownRatio; }
-  void setShownRatio(float);
-
-  void updateConstraintsAndState(WebTopControlsState constraints,
-                                 WebTopControlsState current,
-                                 bool animate);
-
-  void scrollBegin();
-
-  // Scrolls top controls vertically if possible and returns the remaining
-  // scroll amount.
-  FloatSize scrollBy(FloatSize scrollDelta);
-
- private:
-  explicit TopControls(const FrameHost&);
-  void resetBaseline();
-
-  Member<const FrameHost> m_frameHost;
-
-  // The top controls height regardless of whether it is visible or not.
-  float m_height;
-
-  // The top controls shown amount (normalized from 0 to 1) since the last
-  // compositor commit. This value is updated from two sources:
-  // (1) compositor (impl) thread at the beginning of frame if it has
-  //     scrolled top controls since last commit.
-  // (2) blink (main) thread updates this value if it scrolls top controls
-  //     when responding to gesture scroll events.
-  // This value is reflected in web layer tree and is synced with compositor
-  // during the commit.
-  float m_shownRatio;
-
-  // Content offset when last re-baseline occurred.
-  float m_baselineContentOffset;
-
-  // Accumulated scroll delta since last re-baseline.
-  float m_accumulatedScrollDelta;
-
-  // If this is true, then the embedder shrunk the WebView size by the top
-  // controls height.
-  bool m_shrinkViewport;
-
-  // Constraints on the top controls state
-  WebTopControlsState m_permittedState;
-};
-}  // namespace blink
-
-#endif  // TopControls_h