Enable extension APIs for content scripts.

chrome/browser/extensions/content_script_apitest.cc

Index: chrome/browser/extensions/content_script_apitest.cc
diff --git a/chrome/browser/extensions/content_script_apitest.cc b/chrome/browser/extensions/content_script_apitest.cc
index a124f9b2b8f5e52192950dedc37eeef8ca8fee50..69110c7eb02b30cc9c10fe67308e1b1dcfca0d0c 100644
--- a/chrome/browser/extensions/content_script_apitest.cc
+++ b/chrome/browser/extensions/content_script_apitest.cc
@@ -111,3 +111,12 @@ IN_PROC_BROWSER_TEST_F(ExtensionApiTest, ContentScriptCSSLocalization) {
   ASSERT_TRUE(StartTestServer());
   ASSERT_TRUE(RunExtensionTest("content_scripts/css_l10n")) << message_;
 }
+
+IN_PROC_BROWSER_TEST_F(ExtensionApiTest, ContentScriptExtensionAPIs) {
+  ASSERT_TRUE(StartTestServer());
+  LoadExtension(test_data_dir_.AppendASCII("content_scripts/extension_api"));
+  ResultCatcher catcher;
+  ui_test_utils::NavigateToURL(
+      browser(), test_server()->GetURL("functions.html"));
+  EXPECT_TRUE(catcher.GetNextResult());
+}