bluetooth: Improve GATT disconnected error message.

third_party/WebKit/LayoutTests/bluetooth/generate.py

 # Copyright 2016 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.
 """Generator script for Web Bluetooth LayoutTests.
 
 For each script-tests/X.js creates the following test files depending on the
 contents of X.js
 - getPrimaryService/X.html
 - getPrimaryServices/X.html
 - getPrimaryServices/X-with-uuid.html
@@ skipping 77 matching lines @@
 
     # Generate Test Files
     for template in available_templates:
         # Read template
         template_file_handle = open(template)
         template_file_data = template_file_handle.read().decode('utf-8')
         template_file_handle.close()
 
         template_name = os.path.splitext(os.path.basename(template))[0]
 
-        result = re.search(r'CALLS\(\[(.*?)\]\)', template_file_data, re.MULTILINE
-            | re.DOTALL)
+        # Find function names in multiline pattern: CALLS( [ function_name,function_name2[UUID] ])
+        result = re.search(
+            r'CALLS\(' + # CALLS(
+            r'[^\[]*' +  # Any characters not [, allowing for new lines.
+            r'\[' +      # [
+            r'(.*?)' +   # group matching: function_name(), function_name2[UUID]
+            r'\]\)',     # adjacent closing characters: ])
+            template_file_data, re.MULTILINE | re.DOTALL)
 
         if result is None:
             raise Exception('Template must contain \'CALLS\' tokens')
 
         new_test_file_data = base_template_file_data.replace('TEST',
             template_file_data)
         # Replace CALLS([...]) with CALLS so that we don't have to replace the
         # CALLS([...]) for every new test file.
         new_test_file_data = new_test_file_data.replace(result.group(), 'CALLS')
 
@@ skipping 29 matching lines @@
         # Create or open test file
         test_file_handle = open(generated_test.path, 'wb')
 
         # Write contents
         test_file_handle.write(generated_test.data.encode('utf-8'))
         test_file_handle.close()
 
 
 if __name__ == '__main__':
     sys.exit(main())