Add a function to send scripts from a browsertest to an extension's background page.

chrome/browser/extensions/extension_browsertest_util.h

Index: chrome/browser/extensions/extension_browsertest_util.h
diff --git a/chrome/browser/extensions/extension_browsertest_util.h b/chrome/browser/extensions/extension_browsertest_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..ed81762825aeb51a835f40d3f094fb3509a1c24a
--- /dev/null
+++ b/chrome/browser/extensions/extension_browsertest_util.h
@@ -0,0 +1,24 @@
+// Copyright (c) 2013 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.
+
+#ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSERTEST_UTIL_H_
+#define CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSERTEST_UTIL_H_

[not at google - send to devlin, 2013/09/03 23:13:38]

just browsertest_util?

[Jeffrey Yasskin, 2013/09/03 23:33:13]

Sure, done.

+
+#include <string>
+
+class Profile;
+
+namespace extensions {
+

[not at google - send to devlin, 2013/09/03 23:13:38]

can we put this file in a browsertest_util namespace?

[Jeffrey Yasskin, 2013/09/03 23:33:13]

After some discussion about a 'testing' namespace (downside: using gtest and
gmock facilities inside the extensions namespace would now require writing
"::testing"), we agree to use browsertest_util, to help people reading code
figure out what file to look in to find these functions.

+// Waits until |script| calls "window.domAutomationController.send('string')"

[not at google - send to devlin, 2013/09/03 23:13:38]

what is 'string'?

[Jeffrey Yasskin, 2013/09/03 23:33:13]

How's the new comment?

+// and returns the string. Fails the test and returns an empty string if
+// |extension_id| isn't installed in |profile| or doesn't have a background
+// page, or if executing the script fails.
+std::string ExecuteScriptInBackgroundPage(Profile* profile,
+                                          const std::string& extension_id,
+                                          const std::string& script);
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSERTEST_UTIL_H_