[DRAFT] Allow a user to revert to their previous theme without closing infobar

chrome/browser/extensions/extension_install_ui_browsertest.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 "base/strings/string_util.h"
 #include "chrome/app/chrome_command_ids.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/extensions/extension_sorting.h"
@@ skipping 30 matching lines @@
     ConfirmInfoBarDelegate* delegate =
         infobar_service->infobar_at(0)->AsConfirmInfoBarDelegate();
     ASSERT_TRUE(delegate);
     delegate->Cancel();
     ASSERT_EQ(0U, infobar_service->infobar_count());
   }
 
   // Install the given theme from the data dir and verify expected name.
   void InstallThemeAndVerify(const char* theme_name,
                              const std::string& expected_name) {
+    // If there is already a theme installed, the current theme should be
+    // disabled and the new one installed + enabled.
+    int expected_change = GetTheme() ? 0 : 1;
     const base::FilePath theme_path = test_data_dir_.AppendASCII(theme_name);
-    ASSERT_TRUE(InstallExtensionWithUIAutoConfirm(theme_path, 1, browser()));
+    ASSERT_TRUE(InstallExtensionWithUIAutoConfirm(theme_path, expected_change,
+        browser()));
     const Extension* theme = GetTheme();
     ASSERT_TRUE(theme);
     ASSERT_EQ(theme->name(), expected_name);
   }
 
   const Extension* GetTheme() const {
     return ThemeServiceFactory::GetThemeForProfile(browser()->profile());
   }
 };
 
@@ skipping 10 matching lines @@
   // Install theme once and undo to verify we go back to default theme.
   base::FilePath theme_crx = PackExtension(test_data_dir_.AppendASCII("theme"));
   ASSERT_TRUE(InstallExtensionWithUIAutoConfirm(theme_crx, 1, browser()));
   const Extension* theme = GetTheme();
   ASSERT_TRUE(theme);
   std::string theme_id = theme->id();
   VerifyThemeInfoBarAndUndoInstall();
   ASSERT_EQ(NULL, GetTheme());
 
   // Set the same theme twice and undo to verify we go back to default theme.
-  ASSERT_TRUE(InstallExtensionWithUIAutoConfirm(theme_crx, 1, browser()));
+  ASSERT_TRUE(InstallExtensionWithUIAutoConfirm(theme_crx, 0, browser()));
   theme = GetTheme();
   ASSERT_TRUE(theme);
   ASSERT_EQ(theme_id, theme->id());
   ASSERT_TRUE(InstallExtensionWithUIAutoConfirm(theme_crx, 0, browser()));
   theme = GetTheme();
   ASSERT_TRUE(theme);
   ASSERT_EQ(theme_id, theme->id());
   VerifyThemeInfoBarAndUndoInstall();
   ASSERT_EQ(NULL, GetTheme());
 }
@@ skipping 122 matching lines @@
                             std::string(),
                             extension_misc::kWebStoreAppId);
   EXPECT_EQ(app_id, last_reordered_extension_id_);
 
   // Now install the app.
   const extensions::Extension* test_app = LoadExtension(app_dir);
   ASSERT_TRUE(test_app);
   EXPECT_TRUE(service->GetInstalledExtension(app_id));
   EXPECT_EQ(app_id, test_app->id());
 }