Add support for a "split" incognito behavior for extensions.

chrome/browser/extensions/extension_incognito_apitest.cc

Index: chrome/browser/extensions/extension_incognito_apitest.cc
diff --git a/chrome/browser/extensions/extension_incognito_apitest.cc b/chrome/browser/extensions/extension_incognito_apitest.cc
index dbc9234c51b3b59146dc078716a59e558d7e1d28..8a138b98294bf8610bda34babc40549f00e6fc78 100644
--- a/chrome/browser/extensions/extension_incognito_apitest.cc
+++ b/chrome/browser/extensions/extension_incognito_apitest.cc
@@ -95,6 +95,31 @@ IN_PROC_BROWSER_TEST_F(ExtensionApiTest, Incognito) {
   EXPECT_TRUE(catcher.GetNextResult()) << catcher.message();
 }
 
+// Tests that the APIs in an incognito-enabled split-mode extension work
+// properly.
+IN_PROC_BROWSER_TEST_F(ExtensionApiTest, IncognitoSplitMode) {
+  host_resolver()->AddRule("*", "127.0.0.1");
+  ASSERT_TRUE(test_server()->Start());
+
+  // We need 2 ResultCatchers because we'll be running the same test in both
+  // regular and incognito mode.
+  ResultCatcher catcher;
+  catcher.RestrictToProfile(browser()->profile());
+  ResultCatcher catcher_incognito;
+  catcher_incognito.RestrictToProfile(
+      browser()->profile()->GetOffTheRecordProfile());
+
+  // Open incognito window and navigate to test page.
+  ui_test_utils::OpenURLOffTheRecord(browser()->profile(),
+      GURL("http://www.example.com:1337/files/extensions/test_file.html"));
+
+  ASSERT_TRUE(LoadExtensionIncognito(test_data_dir_
+      .AppendASCII("incognito").AppendASCII("split")));
+
+  EXPECT_TRUE(catcher.GetNextResult()) << catcher.message();
+  EXPECT_TRUE(catcher_incognito.GetNextResult()) << catcher.message();
+}
+
 // Tests that the APIs in an incognito-disabled extension don't see incognito
 // events or callbacks.
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, IncognitoDisabled) {