Avoid some static initializers in Windows builds

third_party/WebKit/Source/core/input/MouseEventManager.cpp

 // Copyright 2016 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/input/MouseEventManager.h"
 
 #include "core/clipboard/DataObject.h"
 #include "core/clipboard/DataTransfer.h"
 #include "core/dom/Element.h"
 #include "core/dom/ElementTraversal.h"
@@ skipping 44 matching lines @@
 }
 
 // The amount of time to wait before sending a fake mouse event triggered
 // during a scroll.
 const double kFakeMouseMoveInterval = 0.1;
 
 // TODO(crbug.com/653490): Read these values from the OS.
 #if OS(MACOSX)
 const int kDragThresholdX = 3;
 const int kDragThresholdY = 3;
-const TimeDelta kTextDragDelay = TimeDelta::FromSecondsD(0.15);
+constexpr TimeDelta kTextDragDelay = TimeDelta::FromSecondsD(0.15);
 #else
 const int kDragThresholdX = 4;
 const int kDragThresholdY = 4;
-const TimeDelta kTextDragDelay = TimeDelta::FromSecondsD(0.0);
+constexpr TimeDelta kTextDragDelay = TimeDelta::FromSecondsD(0.0);
 #endif
 
 }  // namespace
 
 enum class DragInitiator { kMouse, kTouch };
 
 MouseEventManager::MouseEventManager(LocalFrame& frame,
                                      ScrollManager& scroll_manager)
     : frame_(frame),
       scroll_manager_(scroll_manager),
@@ skipping 1007 matching lines @@
 
 void MouseEventManager::SetClickCount(int click_count) {
   click_count_ = click_count;
 }
 
 bool MouseEventManager::MouseDownMayStartDrag() {
   return mouse_down_may_start_drag_;
 }
 
 }  // namespace blink