Make chrome.omnibox.setDefaultSuggestion work when called inside

chrome/browser/extensions/extension_omnibox_api.cc

 // Copyright (c) 2010 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/extension_omnibox_api.h"
 
 #include "base/json/json_writer.h"
 #include "base/singleton.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 146 matching lines @@
     suggestion.description_styles.clear();
     suggestion.description_styles.push_back(
         ACMatchClassification(0, ACMatchClassification::NONE));
   }
 
   // Store the suggestion in the extension's runtime data.
   GetPropertyAccessor().SetProperty(
       profile_->GetExtensionsService()->GetPropertyBag(GetExtension()),
       suggestion);
 
+  NotificationService::current()->Notify(
+      NotificationType::EXTENSION_OMNIBOX_DEFAULT_SUGGESTION_CHANGED,
+      Source<Profile>(profile_),
+      NotificationService::NoDetails());
+
   return true;
 }
 
 ExtensionOmniboxSuggestion::ExtensionOmniboxSuggestion() {}
 
 ExtensionOmniboxSuggestion::~ExtensionOmniboxSuggestion() {}
 
 bool ExtensionOmniboxSuggestion::ReadStylesFromValue(
     const ListValue& styles_value) {
   description_styles.clear();
@@ skipping 71 matching lines @@
     description.replace(placeholder, kPlaceholderText.length(), replacement);
 
     for (size_t i = 0; i < description_styles.size(); ++i) {
       if (description_styles[i].offset > placeholder)
         description_styles[i].offset += replacement.length() - 2;
     }
   }
 
   match->contents.assign(UTF16ToWide(description));
 }