Add PlatformScreenDelegate and start implementation.

services/ui/display/platform_screen_impl_ozone.cc

 // 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 "services/ui/display/platform_screen_impl_ozone.h"
 
 #include <memory>
 
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
@@ skipping 27 matching lines @@
 
 void PlatformScreenImplOzone::Init() {
   // We want display configuration to happen even off device to keep the control
   // flow similar.
   display_configurator_.set_configure_display(true);
   display_configurator_.AddObserver(this);
   display_configurator_.Init(
       ui::OzonePlatform::GetInstance()->CreateNativeDisplayDelegate(), false);
 }
 
-void PlatformScreenImplOzone::ConfigurePhysicalDisplay(
-    const PlatformScreen::ConfiguredDisplayCallback& callback) {
-  callback_ = callback;
+void PlatformScreenImplOzone::ConfigureDisplays(
+    PlatformScreenDelegate* delegate) {
+  DCHECK(delegate);
+  delegate_ = delegate;
 
   if (base::SysInfo::IsRunningOnChromeOS()) {
     display_configurator_.ForceInitialConfigure(kChromeOsBootColor);
   } else {
     if (base::CommandLine::ForCurrentProcess()->HasSwitch("multi-display")) {
       // This really doesn't work properly. Use at your own risk.
       display_configurator_.AddVirtualDisplay(gfx::Size(800, 800));
       display_configurator_.AddVirtualDisplay(gfx::Size(800, 800));
     } else {
       display_configurator_.AddVirtualDisplay(gfx::Size(1024, 768));
@@ skipping 28 matching lines @@
     // Move the origin so that next display is to the right of current display.
     next_display_origin_.Offset(current_mode->size().width(), 0);
 
     // The first display added will be our primary display.
     if (displays_.empty())
       primary_display_id_ = id;
 
     // Keep track of what displays have already been added.
     displays_.insert(display->display_id());
 
-    callback_.Run(id, bounds);
+    delegate_->OnDisplayAdded(this, id, bounds);
   }
 
   DCHECK(displays_ == all_displays) << "Removing displays is not supported.";
 }
 
 void PlatformScreenImplOzone::OnDisplayModeChangeFailed(
     const ui::DisplayConfigurator::DisplayStateList& displays,
     ui::MultipleDisplayState failed_new_state) {
   LOG(ERROR) << "OnDisplayModeChangeFailed from DisplayConfigurator";
 }
 
 }  // namespace display