Don't inject webos API user script for all frames but just the main frame

The webOS API should be accessible through the main window object so it's not required to
insert the user script to initialize the webOS API in every frame but just the main one.

Signed-off-by: Simon Busch <morphis@gravedo.de>
Drop implementation of the PalmServiceBridge which is now part of webkit

Signed-off-by: Simon Busch <morphis@gravedo.de>
Create separate ls2 role definition for QtWebProcess

As we're running the PalmServiceBridge now as part of the QtWebProcess we need to change
the ls2 role definition accordingly.

Signed-off-by: Simon Busch <morphis@gravedo.de>