Add CefDragHandler callbacks for modifying URL drag/drop behavior

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By default, a URL drag can be dropped anywhere on a browser view and the 
default action is to navigate. It would be better if:

1. URL drops could be treated as other drop types where only certain HTML 
elements accept drops.
2. The default URL drop action could be overridden/canceled.

Original issue reported on code.google.com by magreenb...@gmail.com on 4 Oct 2011 at 2:11

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Original comment by magreenb...@gmail.com on 4 Oct 2011 at 2:19

• Added labels: Priority-High
• Removed labels: Priority-Medium

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Revision 320 adds a new NAVTYPE_LINKDROPPED value to the cef_handler_navtype_t 
enum passed to OnBeforeResourceLoad() that will be used when navigation is 
resulting from a drop.

Original comment by magreenb...@gmail.com on 18 Oct 2011 at 12:24

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Original comment by magreenb...@gmail.com on 18 Oct 2011 at 12:24

• Changed state: Fixed

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Comment #2 should say OnBeforeBrowse() instead of OnBeforeResourceLoad().

Original comment by magreenb...@gmail.com on 18 Oct 2011 at 1:52

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Revision 327 adds a CefBrowserSettings.load_drops_disabled option for disabling 
default navigation resulting from drag & drop of URLs.

Original comment by magreenb...@gmail.com on 19 Oct 2011 at 4:38