Emit error events if the loading of an object element failed

components/plugins/renderer/loadable_plugin_placeholder.h

 // Copyright 2015 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.
 
 #ifndef COMPONENTS_PLUGINS_RENDERER_LOADABLE_PLUGIN_PLACEHOLDER_H_
 #define COMPONENTS_PLUGINS_RENDERER_LOADABLE_PLUGIN_PLACEHOLDER_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 27 matching lines @@
   void set_power_saver_enabled(bool power_saver_enabled) {
     power_saver_enabled_ = power_saver_enabled;
   }
 
   // Defer loading of plugin, and instead show the Power Saver poster image.
   void BlockForPowerSaverPoster();
 
   // When we load the plugin, use this already-created plugin, not a new one.
   void SetPremadePlugin(content::PluginInstanceThrottler* throttler);
 
-  void AllowLoading() { allow_loading_ = true; }
+  void AllowLoading() {
+    plugin()->unmarkAsErrorPlaceholder();
+    allow_loading_ = true;
+  }
 
  protected:
   LoadablePluginPlaceholder(content::RenderFrame* render_frame,
                             blink::WebLocalFrame* frame,
                             const blink::WebPluginParams& params,
                             const std::string& html_data);
 
   ~LoadablePluginPlaceholder() override;
 
   void MarkPluginEssential(
@@ skipping 80 matching lines @@
   gfx::Rect unobscured_rect_;
 
   base::WeakPtrFactory<LoadablePluginPlaceholder> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(LoadablePluginPlaceholder);
 };
 
 }  // namespace plugins
 
 #endif  // COMPONENTS_PLUGINS_RENDERER_LOADABLE_PLUGIN_PLACEHOLDER_H_