Fix scroll anchoring during viewport resize.

third_party/WebKit/Source/web/ViewportAnchor.h

Index: third_party/WebKit/Source/web/ViewportAnchor.h
diff --git a/third_party/WebKit/Source/web/ViewportAnchor.h b/third_party/WebKit/Source/web/ViewportAnchor.h
deleted file mode 100644
index 187aaa108240e598abf92dd4954242a19f7454ee..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/web/ViewportAnchor.h
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright (C) 2013 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef ViewportAnchor_h
-#define ViewportAnchor_h
-
-#include "platform/heap/Handle.h"
-
-namespace blink {
-
-class FrameView;
-class VisualViewport;
-
-// Use derived ViewportAnchor classes to "anchor" the viewport to a location,
-// perform some operation that may move the viewport around, then restore
-// the viewport to the original location.
-// We support two kinds of anchors, a rotation anchor and a resize anchor.
-class ViewportAnchor {
-    STACK_ALLOCATED();
-protected:
-    ViewportAnchor(FrameView& rootFrameView, VisualViewport& visualViewport)
-        : m_rootFrameView(&rootFrameView)
-        , m_visualViewport(&visualViewport)
-    {
-    }
-
-    Member<FrameView> m_rootFrameView;
-    Member<VisualViewport> m_visualViewport;
-};
-
-} // namespace blink
-
-#endif // ViewportAnchor_h