Summary:
This implementation is about to enable ‘Media capture and Streams’ API on Xwalk 
Tizen. It will mainly fill the gap that Xwalk Tizen can only work with ‘v4l2’ 
camera devices, whereas the camera driver on the Tizen Mobile PR3 platform is 
not the case.

Related feature in Jira:
https://crosswalk-project.org/jira/browse/XWALK-176

Target Release:
M4

Planned implementation:
https://github.com/crosswalk-project/chromium-crosswalk/pull/68

On Tizen 2.1, apps/libs that want to use camera are supposed to talk to the 
gst-plugin 'camerasrc'. This element in turn interacts with the camera device 
via the platform-specific interfaces in addition to the standard linux 'v4l2' 
interfaces. However chromium currently can only work with the 'v4l2' camera 
devices. So it's unable to drive camera on Tizen. The solution is to hack 
‘camerasrc', minimally cherry-picking the code snippets from it that can barely 
bring up the camera, and dropping other plenty of gstreamer-related code in 
order to maximally keep chromium clean meanwhile.


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