replaced the string 'chrome-extensions://' with constants

chrome/browser/extensions/gtalk_extension_browsertest.cc

 // Copyright (c) 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 "base/bind.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
+#include "content/public/common/url_constants.h"
 #include "content/public/test/browser_test_utils.h"
 #include "extensions/browser/extension_host.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/browser/process_manager.h"
+#include "extensions/common/constants.h"
 
 using content::RenderViewHost;
 using content::WebContents;
 using extensions::Extension;
 
 class GtalkExtensionTest : public ExtensionBrowserTest {
  protected:
   extensions::ProcessManager* GetProcessManager() {
     return extensions::ExtensionSystem::Get(browser()->profile())->
         process_manager();
@@ skipping 12 matching lines @@
 
   RenderViewHost* GetViewer() {
     std::vector<RenderViewHost*> views = GetMatchingViews(GetViewerUrl());
     EXPECT_EQ(1U, views.size());
     if (views.empty())
       return NULL;
     return views.front();
   }
 
   std::string GetViewerUrl() {
-    return "chrome-extension://" + GetInstalledExtensionId() + "/viewer.html";
+    return std::string(extensions::kExtensionScheme) +
+      content::kStandardSchemeSeparator +
+      GetInstalledExtensionId() + "/viewer.html";
   }
 
   std::vector<RenderViewHost*> GetMatchingViews(const std::string& url_query) {
     extensions::ProcessManager* manager = GetProcessManager();
     extensions::ProcessManager::ViewSet all_views = manager->GetAllViews();
     std::vector<RenderViewHost*> matching_views;
     for (extensions::ProcessManager::ViewSet::const_iterator iter =
          all_views.begin(); iter != all_views.end(); ++iter) {
       WebContents* web_contents = WebContents::FromRenderViewHost(*iter);
       std::string url = web_contents->GetURL().spec();
@@ skipping 16 matching lines @@
 };
 
 IN_PROC_BROWSER_TEST_F(GtalkExtensionTest, InstallCurrent) {
   content::WindowedNotificationObserver panel_loaded(
     chrome::NOTIFICATION_EXTENSION_VIEW_REGISTERED,
     content::NotificationService::AllSources());
   InstallGtalkExtension(ReadCurrentVersion());
   panel_loaded.Wait();
   ASSERT_TRUE(GetViewer());
 }