Support javascript gtests in an extension background page.

chrome/test/base/javascript_browser_test.h

Index: chrome/test/base/javascript_browser_test.h
diff --git a/chrome/test/base/javascript_browser_test.h b/chrome/test/base/javascript_browser_test.h
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+// Copyright 2014 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_TEST_BASE_JAVASCRIPT_BROWSER_TEST_H_
+#define CHROME_TEST_BASE_JAVASCRIPT_BROWSER_TEST_H_
+
+#include "base/memory/scoped_vector.h"
+#include "base/strings/string16.h"
+#include "base/values.h"
+#include "chrome/test/base/in_process_browser_test.h"
+
+// A base class providing construction of javascript testing assets.
+class JavaScriptBrowserTest : public InProcessBrowserTest {
+ public:
+  static const base::FilePath::CharType kA11yAuditLibraryJSPath[];
+  static const base::FilePath::CharType kMockJSPath[];
+  static const base::FilePath::CharType kWebUILibraryJS[];
+  static const base::FilePath::CharType kWebUITestFolder[];
+
+  typedef ScopedVector<const base::Value> ConstValueVector;
+
+  // Add a custom helper JS library for your test.
+  // If a relative path is specified, it'll be read
+  // as relative to the test data dir.
+  void AddLibrary(const base::FilePath& library_path);
+
+ protected:
+  JavaScriptBrowserTest();
+
+  virtual ~JavaScriptBrowserTest();
+
+  // InProcessBrowserTest overrides.
+  virtual void SetUpOnMainThread() OVERRIDE;
+
+  // Builds a vector of strings of all added javascript libraries suitable for
+  // execution by subclasses.
+  void BuildJavascriptLibraries(std::vector<base::string16>* libraries);
+
+  // Builds a string with a call to the runTest JS function, passing the
+  // given |is_async|, |test_name| and its |args|.
+  // This is then suitable for execution by subclasses in a
+  // |RunJavaScriptBrowserTestF| call.
+  base::string16 BuildRunTestJSCall(bool is_async,
+                                    const std::string& test_name,
+                                    const ConstValueVector& args);
+
+ private:
+  // User added libraries.
+  std::vector<base::FilePath> user_libraries_;
+
+  // User library search paths.
+  std::vector<base::FilePath> library_search_paths_;
+
+  DISALLOW_COPY_AND_ASSIGN(JavaScriptBrowserTest);
+};
+
+#endif  // CHROME_TEST_BASE_JAVASCRIPT_BROWSER_TEST_H_