Use WebViewHelper::LocalMainFrame where possible.

third_party/WebKit/Source/core/frame/FrameTestHelpers.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 310 matching lines @@
 }
 
 void WebViewHelper::Reset() {
   if (web_view_) {
     DCHECK(!TestWebFrameClient::IsLoading());
     web_view_->Close();
     web_view_ = nullptr;
   }
 }
 
-WebLocalFrameBase* WebViewHelper::LocalMainFrame() {
+WebLocalFrameBase* WebViewHelper::LocalMainFrame() const {
   return ToWebLocalFrameBase(web_view_->MainFrame());
 }
 
-WebRemoteFrameBase* WebViewHelper::RemoteMainFrame() {
+WebRemoteFrameBase* WebViewHelper::RemoteMainFrame() const {
   return ToWebRemoteFrameBase(web_view_->MainFrame());
 }
 
 void WebViewHelper::Resize(WebSize size) {
   test_web_view_client_->ClearAnimationScheduled();
   WebView()->Resize(size);
   EXPECT_FALSE(test_web_view_client_->AnimationScheduled());
   test_web_view_client_->ClearAnimationScheduled();
 }
 
@@ skipping 99 matching lines @@
   test_web_view_client_.ScheduleAnimation();
 }
 
 void TestWebViewWidgetClient::DidMeaningfulLayout(
     WebMeaningfulLayout layout_type) {
   test_web_view_client_.DidMeaningfulLayout(layout_type);
 }
 
 }  // namespace FrameTestHelpers
 }  // namespace blink