Emit error events if the loading of an object element failed

components/plugins/renderer/webview_plugin.cc

 // Copyright 2013 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/plugins/renderer/webview_plugin.h"
 
 #include <stddef.h>
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
@@ skipping 227 matching lines @@
 void WebViewPlugin::didFinishLoading() {
   DCHECK(!finished_loading_);
   finished_loading_ = true;
 }
 
 void WebViewPlugin::didFailLoading(const WebURLError& error) {
   DCHECK(!error_.get());
   error_.reset(new WebURLError(error));
 }
 
+void WebViewPlugin::markAsErrorPlaceholder() {
+  placeholder = true;
+}
+
+void WebViewPlugin::unmarkAsErrorPlaceholder() {
+  placeholder = false;
+}
+
+bool WebViewPlugin::isPlaceholder() {
+  return placeholder;
+}
+
 WebViewPlugin::WebViewHelper::WebViewHelper(
     WebViewPlugin* plugin,
     const WebPreferences& preferences) : plugin_(plugin) {
   web_view_ =
       WebView::create(this, blink::WebPageVisibilityStateVisible);
   // ApplyWebPreferences before making a WebLocalFrame so that the frame sees a
   // consistent view of our preferences.
   content::RenderView::ApplyWebPreferences(preferences, web_view_);
   WebLocalFrame* web_frame = WebLocalFrame::create(
       blink::WebTreeScopeType::Document, this, nullptr, nullptr);
@@ skipping 88 matching lines @@
   if (!delegate_)
     return;
 
   // The delegate may instantiate a new plugin.
   delegate_->OnUnobscuredRectUpdate(gfx::Rect(unobscured_rect));
   // The delegate may have dirtied style and layout of the WebView.
   // See for example the resizePoster function in plugin_poster.html.
   // Run the lifecycle now so that it is clean.
   web_view()->updateAllLifecyclePhases();
 }