Adding swicth to parent frame command to the wire protocol

Author: barancev

wire.py

@@ -738,6 +738,11 @@ def main():
                'If the currently selected window has been closed.').
       AddError('NoSuchFrame', 'If the frame specified by `id` cannot be found.'))
 
+  resources.append(
+      SessionResource('/session/:sessionId/frame/parent').
+          Post('''Change focus to the parent context. If the current context is the top level \
+browsing context, the context remains unchanged.'''))
+
   resources.append(
       SessionResource('/session/:sessionId/window').
       Post('''Change focus to another window. The window to change focus to \