Make gpu/config/process_json.py work with Python 3.

dict.has_key() does not exist in Python 3. Just use dict.get() to achieve
the same result with fewer checks.

Bug: 941669
Change-Id: Iaeec0ac1ec8efd88c796c73344fea91eaab0df7f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2236435
Auto-Submit: Raphael Kubo da Costa <raphael.kubo.da.costa@intel.com>
Commit-Queue: Zhenyao Mo <zmo@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#776583}

gpu/config/process_json.py

@@ -530,8 +530,7 @@ def write_conditions(entry_id, is_exception, exception_id, entry,
   write_multi_gpu_style(multi_gpu_style, data_file)
   # group driver info
   if driver_vendor != '' or driver_version != None:
-    if (driver_version and driver_version.has_key('schema') and
-        driver_version['schema'] == 'intel_driver'):
+    if driver_version and driver_version.get('schema') == 'intel_driver':
       assert os_type == 'win', 'Intel driver schema is only for Windows'
       is_intel = (format(vendor_id, '#04x') == '0x8086' or
                   intel_gpu_series_list or