Fix nested GuestView's container bounds calculation.

chrome/browser/pdf/pdf_extension_test_util.h

+// Copyright 2015 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_PDF_PDF_EXTENSION_TEST_UTIL_H_
+#define CHROME_BROWSER_PDF_PDF_EXTENSION_TEST_UTIL_H_
+
+namespace content {
+class WebContents;
+}  // namespace content
+
+namespace pdf_extension_test_util {
+
+// Ensures through PDFScriptingAPI that a PDF has finished loading inside the
+// given |web_contents|.
+// Returns true if it loads successfully or false if it fails. If it doesn't
+// finish loading the test will hang.
+bool EnsurePDFHasLoaded(content::WebContents* web_contents);
+
+}  // namespace pdf_extension_test_util
+
+#endif  // CHROME_BROWSER_PDF_PDF_EXTENSION_TEST_UTIL_H_