Revert of Introduce NON_ZERO_DURATION for animation unit tests

ui/views/controls/textfield/textfield.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/textfield/textfield.h"
 
 #include <string>
 
 #include "base/debug/trace_event.h"
 #include "grit/ui_strings.h"
@@ skipping 52 matching lines @@
   View::ConvertPointToScreen(src, &new_origin);
   r->set_origin(new_origin);
 }
 
 // Get the drag selection timer delay, respecting animation scaling for testing.
 int GetDragSelectionDelay() {
   switch (ui::ScopedAnimationDurationScaleMode::duration_scale_mode()) {
       case ui::ScopedAnimationDurationScaleMode::NORMAL_DURATION: return 100;
       case ui::ScopedAnimationDurationScaleMode::FAST_DURATION:   return 25;
       case ui::ScopedAnimationDurationScaleMode::SLOW_DURATION:   return 400;
-      case ui::ScopedAnimationDurationScaleMode::NON_ZERO_DURATION:   return 1;
       case ui::ScopedAnimationDurationScaleMode::ZERO_DURATION:   return 0;
     }
   return 100;
 }
 
 // Get the default command for a given key |event| and selection state.
 int GetCommandForKeyEvent(const ui::KeyEvent& event, bool has_selection) {
   if (event.type() != ui::ET_KEY_PRESSED || event.IsUnicodeKeyCode())
     return kNoCommand;
 
@@ skipping 1706 matching lines @@
       const size_t length = selection_clipboard_text.length();
       range = gfx::Range(range.start() + length, range.end() + length);
     }
     model_->MoveCursorTo(gfx::SelectionModel(range, affinity));
     UpdateAfterChange(true, true);
     OnAfterUserAction();
   }
 }
 
 }  // namespace views