[Extensions] Update Error Console UI

chrome/browser/extensions/api/developer_private/developer_private_api.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 "chrome/browser/extensions/api/developer_private/developer_private_api.h"
 
 #include "base/base64.h"
 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/lazy_instance.h"
@@ skipping 290 matching lines @@
     extensions::UninstallReason reason) {
   DCHECK(profile_->IsSameProfile(Profile::FromBrowserContext(browser_context)));
   BroadcastItemStateChanged(
       browser_context, developer::EVENT_TYPE_UNINSTALLED, extension->id());
 }
 
 void DeveloperPrivateEventRouter::OnErrorAdded(const ExtensionError* error) {
   // We don't want to handle errors thrown by extensions subscribed to these
   // events (currently only the Apps Developer Tool), because doing so risks
   // entering a loop.
-  if (extension_ids_.find(error->extension_id()) != extension_ids_.end())
+  if (extension_ids_.count(error->extension_id()))
     return;
 
   BroadcastItemStateChanged(
       profile_, developer::EVENT_TYPE_ERROR_ADDED, error->extension_id());
 }
 
+void DeveloperPrivateEventRouter::OnErrorsRemoved(
+    const std::set<std::string>& removed_ids) {
+  for (const std::string& id : removed_ids) {
+    if (!extension_ids_.count(id)) {
+      BroadcastItemStateChanged(
+          profile_, developer::EVENT_TYPE_ERRORS_REMOVED, id);
+    }
+  }
+}
+
 void DeveloperPrivateEventRouter::OnExtensionFrameRegistered(
     const std::string& extension_id,
     content::RenderFrameHost* render_frame_host) {
   BroadcastItemStateChanged(
       profile_, developer::EVENT_TYPE_VIEW_REGISTERED, extension_id);
 }
 
 void DeveloperPrivateEventRouter::OnExtensionFrameUnregistered(
     const std::string& extension_id,
     content::RenderFrameHost* render_frame_host) {
@@ skipping 1045 matching lines @@
   // We explicitly show manifest.json in order to work around an issue in OSX
   // where opening the directory doesn't focus the Finder.
   platform_util::ShowItemInFolder(GetProfile(),
                                   extension->path().Append(kManifestFilename));
   return RespondNow(NoArguments());
 }
 
 }  // namespace api
 
 }  // namespace extensions