Bring in pdfium code into third_party/pdfium.

tools/licenses.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 """Utility for checking and processing licensing information in third_party
 directories.
 
 Usage: licenses.py <command>
 
@@ skipping 132 matching lines @@
         "Name": "linux-syscall-support",
         "URL": "http://code.google.com/p/linux-syscall-support/",
         "License": "BSD",
         "License File": "/LICENSE",
     },
     os.path.join('third_party', 'ots'): {
         "Name": "OTS (OpenType Sanitizer)",
         "URL": "http://code.google.com/p/ots/",
         "License": "BSD",
     },
+    os.path.join('third_party', 'pdf'): {
+        "Name": "PDFium",
+        "URL": "http://code.google.com/p/pdfium/",
+        "License": "BSD",
+    },
     os.path.join('third_party', 'pdfsqueeze'): {
         "Name": "pdfsqueeze",
         "URL": "http://code.google.com/p/pdfsqueeze/",
         "License": "Apache 2.0",
         "License File": "COPYING",
     },
     os.path.join('third_party', 'ppapi'): {
         "Name": "ppapi",
         "URL": "http://code.google.com/p/ppapi/",
     },
@@ skipping 291 matching lines @@
     elif command == 'credits':
         if not GenerateCredits():
             return 1
     else:
         print __doc__
         return 1
 
 
 if __name__ == '__main__':
   sys.exit(main())