Check for warnings when loading extensions in browser tests.

chrome/browser/extensions/api/extension_action/page_action_apitest.cc

Index: chrome/browser/extensions/api/extension_action/page_action_apitest.cc
diff --git a/chrome/browser/extensions/api/extension_action/page_action_apitest.cc b/chrome/browser/extensions/api/extension_action/page_action_apitest.cc
index 1b7d599000f9afa22ff599f4689c078df8a36039..b6f1cc6ed2d084e3a698d4fc17a5007f5d64a3dc 100644
--- a/chrome/browser/extensions/api/extension_action/page_action_apitest.cc
+++ b/chrome/browser/extensions/api/extension_action/page_action_apitest.cc
@@ -145,7 +145,8 @@ IN_PROC_BROWSER_TEST_F(ExtensionApiTest, PageActionRemovePopup) {
 // Tests old-style pageActions API that is deprecated but we don't want to
 // break.
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, OldPageActions) {
-  ASSERT_TRUE(RunExtensionTest("page_action/old_api")) << message_;
+  ASSERT_TRUE(RunExtensionTestIgnoreManifestWarnings("page_action/old_api")) <<
+      message_;
   const Extension* extension = GetSingleLoadedExtension();
   ASSERT_TRUE(extension) << message_;