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diff --git a/chrome/browser/cocoa/cocoa_test_helper.h b/chrome/browser/cocoa/cocoa_test_helper.h
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+++ b/chrome/browser/cocoa/cocoa_test_helper.h
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+// Copyright (c) 2009 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_COCOA_COCOA_TEST_HELPER
+#define CHROME_BROWSER_COCOA_COCOA_TEST_HELPER
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/file_path.h"
+#include "base/mac_util.h"
+#include "base/path_service.h"
+
+#if defined(GOOGLE_CHROME_BUILD)
+#define APP_NAME "Chrome.app"
+#else
+#define APP_NAME "Chromium.app"
+#endif
+
+// A class that initializes Cocoa and sets up resources for many of our
+// Cocoa controller unit tests. It does several key things:
+//   - Creates and displays an empty Cocoa window for views to live in
+//   - Loads the appropriate bundle so nib loading works. When loading the
+//     nib in the class being tested, your must use |mac_util::MainAppBundle()|
+//     as the bundle. If you do not specify a bundle, your test will likely
+//     fail.
+// It currently does not create an autorelease pool, though that can easily be
+// added. If your test wants one, it can derrive from PlatformTest instead of
+// testing::Test.
+
+class CocoaTestHelper {
+ public:
+  CocoaTestHelper() {
+    // Look in the Chromium app bundle for resources.
+    FilePath path;
+    PathService::Get(base::DIR_EXE, &path);
+    path = path.AppendASCII(APP_NAME);
+    mac_util::SetOverrideAppBundlePath(path);
+
+    // Bootstrap Cocoa. It's very unhappy without this.
+    [NSApplication sharedApplication];
+
+    // Create a window.
+    NSRect frame = NSMakeRect(0, 0, 800, 600);
+    window_.reset([[NSWindow alloc] initWithContentRect:frame
+                                              styleMask:0
+                                                backing:NSBackingStoreBuffered
+                                                  defer:NO]);
+    [window_ orderFront:nil];
+  }
+
+  // Access the Cocoa window created for the test.
+  NSWindow* window() const { return window_.get(); }
+
+ private:
+  scoped_nsobject<NSWindow> window_;
+};
+
+#endif  // CHROME_BROWSER_COCOA_COCOA_TEST_HELPER