Move kInvalidDisplayID to display_constants.h.

ui/display/display.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/display/display.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 58 matching lines @@
 
 // static
 void Display::ResetForceDeviceScaleFactorForTesting() {
   g_has_forced_device_scale_factor = -1;
   g_forced_device_scale_factor = -1.0;
 }
 
 constexpr int DEFAULT_BITS_PER_PIXEL = 24;
 constexpr int DEFAULT_BITS_PER_COMPONENT = 8;
 
-Display::Display() : Display(kInvalidDisplayID) {}
+Display::Display() : Display(kInvalidDisplayId) {}
 
 Display::Display(int64_t id) : Display(id, gfx::Rect()) {}
 
 Display::Display(int64_t id, const gfx::Rect& bounds)
     : id_(id),
       bounds_(bounds),
       work_area_(bounds),
       device_scale_factor_(GetForcedDeviceScaleFactor()),
       color_depth_(DEFAULT_BITS_PER_PIXEL),
       depth_per_component_(DEFAULT_BITS_PER_COMPONENT) {
@@ skipping 90 matching lines @@
       work_area_.ToString().c_str(), device_scale_factor_,
       IsInternal() ? "internal" : "external");
 }
 
 bool Display::IsInternal() const {
   return is_valid() && (id_ == internal_display_id_);
 }
 
 // static
 int64_t Display::InternalDisplayId() {
-  DCHECK_NE(kInvalidDisplayID, internal_display_id_);
+  DCHECK_NE(kInvalidDisplayId, internal_display_id_);
   return internal_display_id_;
 }
 
 // static
 void Display::SetInternalDisplayId(int64_t internal_display_id) {
   internal_display_id_ = internal_display_id;
 }
 
 // static
 bool Display::IsInternalDisplayId(int64_t display_id) {
-  DCHECK_NE(kInvalidDisplayID, display_id);
+  DCHECK_NE(kInvalidDisplayId, display_id);
   return HasInternalDisplay() && internal_display_id_ == display_id;
 }
 
 // static
 bool Display::HasInternalDisplay() {
-  return internal_display_id_ != kInvalidDisplayID;
+  return internal_display_id_ != kInvalidDisplayId;
 }
 
 }  // namespace display