Move history API out of experimental. Allow extensions to override history page.

chrome/browser/extensions/extension_override_apitest.cc

 // Copyright (c) 2009 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_apitest.h"
+#include "chrome/test/ui_test_utils.h"
 
-IN_PROC_BROWSER_TEST_F(ExtensionApiTest, Overrides) {
-  // The first pass response is the creation of a new tab.
-  ASSERT_TRUE(RunExtensionTest("override")) << message_;
+IN_PROC_BROWSER_TEST_F(ExtensionApiTest, OverrideNewtab) {
+  ASSERT_TRUE(RunExtensionTest("override/newtab")) << message_;
+  {
+    ResultCatcher catcher;
+    // Navigate to the new tab page.  The overridden new tab page 
+    // will call chrome.test.notifyPass() .
+    ui_test_utils::NavigateToURL(browser(), GURL("chrome://newtab/"));
+    ASSERT_TRUE(catcher.GetNextResult());
+  }
 
-  // TODO(erikkay) load a second override and verify behavior, then unload
-  // the first and verify behavior, etc.
+  // TODO(erikkay) Load a second extension with the same override. 
+  // Verify behavior, then unload the first and verify behavior, etc.
 }
+
+IN_PROC_BROWSER_TEST_F(ExtensionApiTest, OverrideHistory) {
+  ASSERT_TRUE(RunExtensionTest("override/history")) << message_;
+  {
+    ResultCatcher catcher;
+    // Navigate to the history page.  The overridden history page 
+    // will call chrome.test.notifyPass() .
+    ui_test_utils::NavigateToURL(browser(), GURL("chrome://history/"));
+    ASSERT_TRUE(catcher.GetNextResult());
+  }
+}