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

chrome/browser/extensions/window_open_apitest.cc

Index: chrome/browser/extensions/window_open_apitest.cc
diff --git a/chrome/browser/extensions/window_open_apitest.cc b/chrome/browser/extensions/window_open_apitest.cc
index 90bfdae50eddafe23386c2c7b77660470bd5ce3d..8b37713e74f81eb8386c81bc1b66c18f01ddbc7f 100644
--- a/chrome/browser/extensions/window_open_apitest.cc
+++ b/chrome/browser/extensions/window_open_apitest.cc
@@ -21,10 +21,12 @@
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/result_codes.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"
 #include "extensions/common/extension.h"
 #include "extensions/common/switches.h"
 #include "net/dns/mock_host_resolver.h"
@@ -451,7 +453,8 @@ IN_PROC_BROWSER_TEST_F(ExtensionBrowserTest, WindowOpenExtension) {
   ASSERT_TRUE(LoadExtension(
       test_data_dir_.AppendASCII("uitest").AppendASCII("window_open")));
 
-  GURL start_url(std::string("chrome-extension://") +
+  GURL start_url(std::string(extensions::kExtensionScheme) +
+      content::kStandardSchemeSeparator +
       last_loaded_extension_id() + "/test.html");
   ui_test_utils::NavigateToURL(browser(), start_url);
   WebContents* newtab = NULL;
@@ -471,7 +474,8 @@ IN_PROC_BROWSER_TEST_F(ExtensionBrowserTest, WindowOpenInvalidExtension) {
   ASSERT_TRUE(LoadExtension(
       test_data_dir_.AppendASCII("uitest").AppendASCII("window_open")));
 
-  GURL start_url(std::string("chrome-extension://") +
+  GURL start_url(std::string(extensions::kExtensionScheme) +
+      content::kStandardSchemeSeparator +
       last_loaded_extension_id() + "/test.html");
   ui_test_utils::NavigateToURL(browser(), start_url);
   ASSERT_NO_FATAL_FAILURE(
@@ -494,7 +498,8 @@ IN_PROC_BROWSER_TEST_F(ExtensionBrowserTest, WindowOpenNoPrivileges) {
   WebContents* newtab = NULL;
   ASSERT_NO_FATAL_FAILURE(
       OpenWindow(browser()->tab_strip_model()->GetActiveWebContents(),
-      GURL(std::string("chrome-extension://") + last_loaded_extension_id() +
+      GURL(std::string(extensions::kExtensionScheme) +
+          content::kStandardSchemeSeparator + last_loaded_extension_id() +
           "/newtab.html"), false, &newtab));
 
   // Extension API should succeed.