Refactoring button field and its type (2nd try)

content/browser/renderer_host/input/touch_emulator_unittest.cc

 // Copyright 2014 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 "content/browser/renderer_host/input/touch_emulator.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <vector>
@@ skipping 117 matching lines @@
   void ReleaseShift() {
     DCHECK(shift_pressed_);
     shift_pressed_ = false;
     SendKeyboardEvent(WebInputEvent::KeyUp);
   }
 
   void SendMouseEvent(WebInputEvent::Type type, int  x, int y) {
     WebMouseEvent event;
     event.timeStampSeconds = GetNextEventTimeSeconds();
     event.type = type;
-    event.button = mouse_pressed_ ? WebMouseEvent::ButtonLeft :
-        WebMouseEvent::ButtonNone;
+    event.button = mouse_pressed_ ? WebMouseEvent::Button::Left :
+        WebMouseEvent::Button::NoButton;
     event.modifiers = modifiers();
     last_mouse_x_ = x;
     last_mouse_y_ = y;
     event.x = event.windowX = event.globalX = x;
     event.y = event.windowY = event.globalY = y;
     emulator()->HandleMouseEvent(event);
   }
 
   bool SendMouseWheelEvent() {
     WebMouseWheelEvent event;
@@ skipping 413 matching lines @@
   emulator()->Disable();
   EXPECT_EQ("TouchStart TouchCancel", ExpectedEvents());
   emulator()->CancelTouch();
 }
 
 TEST_F(TouchEmulatorTest, ConstructorWithHighDeviceScaleDoesNotCrash) {
   TouchEmulator(this, 4.0f);
 }
 
 }  // namespace content