Make it possible to set the display mode from Chromium

content/browser/web_contents/web_contents_impl.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 "content/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
@@ skipping 1490 matching lines @@
 
   FOR_EACH_OBSERVER(WebContentsObserver,
                     observers_,
                     DidToggleFullscreenModeForTab(IsFullscreenForCurrentTab()));
 }
 
 bool WebContentsImpl::IsFullscreenForCurrentTab() const {
   return delegate_ ? delegate_->IsFullscreenForTabOrPending(this) : false;
 }
 
+blink::WebDisplayMode WebContentsImpl::GetDisplayMode() const {
+  return delegate_ ? delegate_->GetDisplayMode(this)
+                   : blink::WebDisplayModeBrowser;
+}
+
 void WebContentsImpl::RequestToLockMouse(bool user_gesture,
                                          bool last_unlocked_by_target) {
   if (delegate_) {
     delegate_->RequestToLockMouse(this, user_gesture, last_unlocked_by_target);
   } else {
     GotResponseToLockMouseRequest(false);
   }
 }
 
 void WebContentsImpl::LostMouseLock() {
@@ skipping 2992 matching lines @@
   node->render_manager()->ResumeResponseDeferredAtStart();
 }
 
 void WebContentsImpl::SetForceDisableOverscrollContent(bool force_disable) {
   force_disable_overscroll_content_ = force_disable;
   if (view_)
     view_->SetOverscrollControllerEnabled(CanOverscrollContent());
 }
 
 }  // namespace content