Add running unit tests to run-bindings-tests.

third_party/WebKit/Tools/Scripts/run-bindings-tests

 #!/usr/bin/python
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 import sys
 
 from webkitpy.bindings.bindings_tests import run_bindings_tests
+from webkitpy.common import webkit_finder
+webkit_finder.add_typ_dir_to_sys_path()
+
+import typ
 
 
 def main(argv):
     """Runs Blink bindings IDL compiler on test IDL files and compares the
     results with reference files.
 
     Please execute the script whenever changes are made to the compiler
     (this is automatically done as a presubmit script),
     and submit changes to the test results in the same patch.
     This makes it easier to track and review changes in generated code.
 
     Options:
        --reset-results: Overwrites reference files with the generated results.
        --verbose: Show output on success and logging messages (not just failure)
     """
     reset_results = '--reset-results' in argv
     verbose = '--verbose' in argv
 
+    # First, run bindings unit tests.
+    return_code = typ.main(
+        top_level_dir=webkit_finder.get_bindings_scripts_dir(),
+        win_multiprocessing='spawn')
+    if return_code != 0:
+        return return_code
+
+    # Now run the bindings end-to-end tests.
     return run_bindings_tests(reset_results, verbose)
 
 
 if __name__ == '__main__':
     sys.exit(main(sys.argv))