Rename classes related to top controls

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

Index: third_party/WebKit/Source/core/frame/TopControls.cpp
diff --git a/third_party/WebKit/Source/core/frame/TopControls.cpp b/third_party/WebKit/Source/core/frame/TopControls.cpp
deleted file mode 100644
index 555bf700e7792dc0d70a2625590eba9f996ae14a..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/core/frame/TopControls.cpp
+++ /dev/null
@@ -1,124 +0,0 @@
-// 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.
-
-#include "core/frame/TopControls.h"
-
-#include "core/frame/FrameHost.h"
-#include "core/frame/VisualViewport.h"
-#include "core/page/ChromeClient.h"
-#include "platform/geometry/FloatSize.h"
-#include <algorithm>  // for std::min and std::max
-
-namespace blink {
-
-TopControls::TopControls(const FrameHost& frameHost)
-    : m_frameHost(&frameHost),
-      m_height(0),
-      m_shownRatio(0),
-      m_baselineContentOffset(0),
-      m_accumulatedScrollDelta(0),
-      m_shrinkViewport(false),
-      m_permittedState(WebTopControlsBoth) {}
-
-DEFINE_TRACE(TopControls) {
-  visitor->trace(m_frameHost);
-}
-
-void TopControls::scrollBegin() {
-  resetBaseline();
-}
-
-FloatSize TopControls::scrollBy(FloatSize pendingDelta) {
-  if ((m_permittedState == WebTopControlsShown && pendingDelta.height() > 0) ||
-      (m_permittedState == WebTopControlsHidden && pendingDelta.height() < 0))
-    return pendingDelta;
-
-  if (m_height == 0)
-    return pendingDelta;
-
-  float oldOffset = contentOffset();
-  float pageScale = m_frameHost->visualViewport().scale();
-
-  // Update accumulated vertical scroll and apply it to top controls
-  // Compute scroll delta in viewport space by applying page scale
-  m_accumulatedScrollDelta += pendingDelta.height() * pageScale;
-
-  float newContentOffset = m_baselineContentOffset - m_accumulatedScrollDelta;
-
-  setShownRatio(newContentOffset / m_height);
-
-  // Reset baseline when controls are fully visible
-  if (m_shownRatio == 1)
-    resetBaseline();
-
-  // Clamp and use the expected content offset so that we don't return
-  // spurrious remaining scrolls due to the imprecision of the shownRatio.
-  newContentOffset = std::min(newContentOffset, m_height);
-  newContentOffset = std::max(newContentOffset, 0.f);
-
-  // We negate the difference because scrolling down (positive delta) causes
-  // top controls to hide (negative offset difference).
-  FloatSize appliedDelta(0, (oldOffset - newContentOffset) / pageScale);
-  return pendingDelta - appliedDelta;
-}
-
-void TopControls::resetBaseline() {
-  m_accumulatedScrollDelta = 0;
-  m_baselineContentOffset = contentOffset();
-}
-
-float TopControls::layoutHeight() {
-  return m_shrinkViewport ? m_height : 0;
-}
-
-float TopControls::contentOffset() {
-  return m_shownRatio * m_height;
-}
-
-void TopControls::setShownRatio(float shownRatio) {
-  shownRatio = std::min(shownRatio, 1.f);
-  shownRatio = std::max(shownRatio, 0.f);
-
-  if (m_shownRatio == shownRatio)
-    return;
-
-  m_shownRatio = shownRatio;
-  m_frameHost->chromeClient().didUpdateTopControls();
-}
-
-void TopControls::updateConstraintsAndState(WebTopControlsState constraints,
-                                            WebTopControlsState current,
-                                            bool animate) {
-  m_permittedState = constraints;
-
-  DCHECK(
-      !(constraints == WebTopControlsShown && current == WebTopControlsHidden));
-  DCHECK(
-      !(constraints == WebTopControlsHidden && current == WebTopControlsShown));
-
-  // If the change should be animated, let the impl thread drive the change.
-  // Otherwise, immediately set the shown ratio so we don't have to wait for
-  // a commit from the impl thread.
-  if (animate)
-    return;
-
-  if (constraints == WebTopControlsBoth && current == WebTopControlsBoth)
-    return;
-
-  if (constraints == WebTopControlsHidden || current == WebTopControlsHidden)
-    setShownRatio(0.f);
-  else
-    setShownRatio(1.f);
-}
-
-void TopControls::setHeight(float height, bool shrinkViewport) {
-  if (m_height == height && m_shrinkViewport == shrinkViewport)
-    return;
-
-  m_height = height;
-  m_shrinkViewport = shrinkViewport;
-  m_frameHost->chromeClient().didUpdateTopControls();
-}
-
-}  // namespace blink