Remove *RowHeightScrollHelper from scroll_view.h/cc

ui/views/controls/scroll_view.cc

 // 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.
 
 #include "ui/views/controls/scroll_view.h"
 
 #include "base/feature_list.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "ui/events/event.h"
@@ skipping 697 matching lines @@
   if (!header_)
     return;
 
   int x_offset = CurrentOffset().x();
   if (header_->x() != -x_offset) {
     header_->SetX(-x_offset);
     header_->SchedulePaintInRect(header_->GetVisibleBounds());
   }
 }
 
-// VariableRowHeightScrollHelper ----------------------------------------------
-
-VariableRowHeightScrollHelper::VariableRowHeightScrollHelper(
-    Controller* controller) : controller_(controller) {
-}
-
-VariableRowHeightScrollHelper::~VariableRowHeightScrollHelper() {
-}
-
-int VariableRowHeightScrollHelper::GetPageScrollIncrement(
-    ScrollView* scroll_view, bool is_horizontal, bool is_positive) {
-  if (is_horizontal)
-    return 0;
-  // y coordinate is most likely negative.
-  int y = abs(scroll_view->contents()->y());
-  int vis_height = scroll_view->contents()->parent()->height();
-  if (is_positive) {
-    // Align the bottom most row to the top of the view.
-    int bottom = std::min(scroll_view->contents()->height() - 1,
-                          y + vis_height);
-    RowInfo bottom_row_info = GetRowInfo(bottom);
-    // If 0, ScrollView will provide a default value.
-    return std::max(0, bottom_row_info.origin - y);
-  } else {
-    // Align the row on the previous page to to the top of the view.
-    int last_page_y = y - vis_height;
-    RowInfo last_page_info = GetRowInfo(std::max(0, last_page_y));
-    if (last_page_y != last_page_info.origin)
-      return std::max(0, y - last_page_info.origin - last_page_info.height);
-    return std::max(0, y - last_page_info.origin);
-  }
-}
-
-int VariableRowHeightScrollHelper::GetLineScrollIncrement(
-    ScrollView* scroll_view, bool is_horizontal, bool is_positive) {
-  if (is_horizontal)
-    return 0;
-  // y coordinate is most likely negative.
-  int y = abs(scroll_view->contents()->y());
-  RowInfo row = GetRowInfo(y);
-  if (is_positive) {
-    return row.height - (y - row.origin);
-  } else if (y == row.origin) {
-    row = GetRowInfo(std::max(0, row.origin - 1));
-    return y - row.origin;
-  } else {
-    return y - row.origin;
-  }
-}
-
-VariableRowHeightScrollHelper::RowInfo
-    VariableRowHeightScrollHelper::GetRowInfo(int y) {
-  return controller_->GetRowInfo(y);
-}
-
-// FixedRowHeightScrollHelper -----------------------------------------------
-
-FixedRowHeightScrollHelper::FixedRowHeightScrollHelper(int top_margin,
-                                                       int row_height)
-    : VariableRowHeightScrollHelper(NULL),
-      top_margin_(top_margin),
-      row_height_(row_height) {
-  DCHECK_GT(row_height, 0);
-}
-
-VariableRowHeightScrollHelper::RowInfo
-    FixedRowHeightScrollHelper::GetRowInfo(int y) {
-  if (y < top_margin_)
-    return RowInfo(0, top_margin_);
-  return RowInfo((y - top_margin_) / row_height_ * row_height_ + top_margin_,
-                 row_height_);
-}
-
 }  // namespace views