Show About in a window too.

chrome/browser/ui/settings_window_manager_browsertest.cc

Index: chrome/browser/ui/settings_window_manager_browsertest.cc
diff --git a/chrome/browser/ui/settings_window_manager_browsertest.cc b/chrome/browser/ui/settings_window_manager_browsertest.cc
index fdb756fb2727ac32492f87ad4853b247fe415d2e..c7a4f00f9bc6caef2c17e4218d07441c52332984 100644
--- a/chrome/browser/ui/settings_window_manager_browsertest.cc
+++ b/chrome/browser/ui/settings_window_manager_browsertest.cc
@@ -194,6 +194,10 @@ IN_PROC_BROWSER_TEST_F(SettingsWindowManagerTest, OpenChromePages) {
   chrome::ShowSettings(browser());
   EXPECT_EQ(2u, chrome::GetTotalBrowserCount());
 
+  // About should reuse the existing Settings window.
+  chrome::ShowAboutChrome(browser());
+  EXPECT_EQ(2u, chrome::GetTotalBrowserCount());
+
   // Extensions should open in an existing browser window.
   CloseNonDefaultBrowsers();
   EXPECT_EQ(1u, chrome::GetTotalBrowserCount());
@@ -204,4 +208,8 @@ IN_PROC_BROWSER_TEST_F(SettingsWindowManagerTest, OpenChromePages) {
   // Downloads should open in an existing browser window.
   chrome::ShowDownloads(browser());
   EXPECT_EQ(1u, chrome::GetTotalBrowserCount());
+
+  // About should open a new browser window.
+  chrome::ShowAboutChrome(browser());
+  EXPECT_EQ(2u, chrome::GetTotalBrowserCount());
 }