Move (Resize|Rotation)ViewportAnchor.* from web/ to core/frame/.

third_party/WebKit/Source/web/ResizeViewportAnchor.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 ResizeViewportAnchor_h
-#define ResizeViewportAnchor_h
-
-#include "core/page/Page.h"
-#include "platform/heap/Handle.h"
-#include "platform/scroll/ScrollTypes.h"
-
-namespace blink {
-
-class FrameView;
-
-// This class scrolls the viewports to compensate for bounds clamping caused by
-// viewport size changes.
-//
-// It is needed when the layout viewport grows (causing its own scroll position
-// to be clamped) and also when it shrinks (causing the visual viewport's scroll
-// position to be clamped).
-class ResizeViewportAnchor final
-    : public GarbageCollected<ResizeViewportAnchor> {
-  WTF_MAKE_NONCOPYABLE(ResizeViewportAnchor);
-
- public:
-  ResizeViewportAnchor(Page& page) : page_(page), scope_count_(0) {}
-
-  class ResizeScope {
-    STACK_ALLOCATED();
-
-   public:
-    explicit ResizeScope(ResizeViewportAnchor& anchor) : anchor_(anchor) {
-      anchor_->BeginScope();
-    }
-    ~ResizeScope() { anchor_->EndScope(); }
-
-   private:
-    Member<ResizeViewportAnchor> anchor_;
-  };
-
-  void ResizeFrameView(IntSize);
-
-  DEFINE_INLINE_TRACE() { visitor->Trace(page_); }
-
- private:
-  void BeginScope() { scope_count_++; }
-  void EndScope();
-  FrameView* RootFrameView();
-
-  // The amount of resize-induced clamping drift accumulated during the
-  // ResizeScope.  Note that this should NOT include other kinds of scrolling
-  // that may occur during layout, such as from ScrollAnchor.
-  ScrollOffset drift_;
-  Member<Page> page_;
-  int scope_count_;
-};
-
-}  // namespace blink
-
-#endif  // ResizeViewportAnchor_h