Move LayoutAndPaintAsyncThen to a separate compilation unit.

components/test_runner/test_interfaces.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 "components/test_runner/test_interfaces.h"
 
 #include <stddef.h>
 
 #include <string>
 
@@ skipping 25 matching lines @@
       delegate_(nullptr),
       app_banner_client_(nullptr) {
   blink::setLayoutTestMode(true);
   // NOTE: please don't put feature specific enable flags here,
   // instead add them to RuntimeEnabledFeatures.in
 
   ResetAll();
 }
 
 TestInterfaces::~TestInterfaces() {
-  accessibility_controller_->SetWebView(0);
-  event_sender_->SetWebView(0);
+  accessibility_controller_->SetWebView(nullptr);
+  event_sender_->SetWebView(nullptr);
   // gamepad_controller_ doesn't depend on WebView.
-  text_input_controller_->SetWebView(NULL);
-  test_runner_->SetWebView(0, 0);
+  text_input_controller_->SetWebView(nullptr);
+  test_runner_->SetWebView(nullptr);
 
-  accessibility_controller_->SetDelegate(0);
-  event_sender_->SetDelegate(0);
-  // gamepad_controller_ ignores SetDelegate(0)
+  accessibility_controller_->SetDelegate(nullptr);
+  event_sender_->SetDelegate(nullptr);
+  // gamepad_controller_ ignores SetDelegate(nullptr)
   // text_input_controller_ doesn't depend on WebTestDelegate.
-  test_runner_->SetDelegate(0);
+  test_runner_->SetDelegate(nullptr);
 }
 
 void TestInterfaces::SetWebView(blink::WebView* web_view,
                                 WebTestProxyBase* proxy) {
   accessibility_controller_->SetWebView(web_view);
   event_sender_->SetWebView(web_view);
   // gamepad_controller_ doesn't depend on WebView.
   text_input_controller_->SetWebView(web_view);
-  test_runner_->SetWebView(web_view, proxy);
+  test_runner_->SetWebView(web_view);
 }
 
 void TestInterfaces::SetDelegate(WebTestDelegate* delegate) {
   accessibility_controller_->SetDelegate(delegate);
   event_sender_->SetDelegate(delegate);
   gamepad_controller_ = GamepadController::Create(delegate);
   // text_input_controller_ doesn't depend on WebTestDelegate.
   test_runner_->SetDelegate(delegate);
   delegate_ = delegate;
 }
@@ skipping 102 matching lines @@
   if (!theme_engine_.get())
     theme_engine_.reset(new MockWebThemeEngine());
   return theme_engine_.get();
 }
 
 AppBannerClient* TestInterfaces::GetAppBannerClient() {
   return app_banner_client_;
 }
 
 }  // namespace test_runner