Abstract WebContentsObserver from Autofill shared code

components/autofill/browser/test_autofill_driver.h

Index: components/autofill/browser/test_autofill_driver.h
diff --git a/components/autofill/browser/test_autofill_driver.h b/components/autofill/browser/test_autofill_driver.h
new file mode 100644
index 0000000000000000000000000000000000000000..6ad09db91b8833386889c1beede6622aab992259
--- /dev/null
+++ b/components/autofill/browser/test_autofill_driver.h
@@ -0,0 +1,34 @@
+// Copyright 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 COMPONENTS_AUTOFILL_BROWSER_TEST_AUTOFILL_DRIVER_H_
+#define COMPONENTS_AUTOFILL_BROWSER_TEST_AUTOFILL_DRIVER_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "components/autofill/browser/autofill_driver.h"
+#include "content/public/browser/web_contents_observer.h"
+
+namespace autofill {
+
+// This class is only for easier writing of tests. All pure virtual functions
+// have been given empty methods.
+// TODO(blundell): Eliminate this class being a WebContentsObserver once
+// autofill shared code no longer needs knowledge of WebContents.
+class TestAutofillDriver : public AutofillDriver,
+                           public content::WebContentsObserver {
+ public:
+  explicit TestAutofillDriver(content::WebContents* web_contents);
+  virtual ~TestAutofillDriver();
+
+  // AutofillDriver implementation.
+  virtual content::WebContents* GetWebContents() OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(TestAutofillDriver);
+};
+
+}  // namespace autofill
+
+#endif  // COMPONENTS_AUTOFILL_BROWSER_TEST_AUTOFILL_DRIVER_H_