If two files from different (sub-)projects include the same header file,
and the defined macros differ for both files, the header file will be
parsed with only the appropriate macros for the including file.

Task-number: QTCREATORBUG-9802
Task-number: QTCREATORBUG-1249

Change-Id: I560490afa287b3bb1e863bce1bb4f57af36ad56e
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

This is step 1 of 2 for merging the various provider factories into a
single class. Merging has the advantage that selecting based on editor
(content) mime-type only has to select one class, instead of re-doing
the selection for each class separately.

Change-Id: I11f815151bd4769ae6028b636793d6a80d02e202
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

Change-Id: Ic6a9ff0359625021ebc061d22db6811814534205
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

Change-Id: Ice592c6de9951ee3b2c4cb52ed0bb3b6770e0825
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

Change-Id: I7134d7de30bcf9f9dcfad42520dd45ee083a852d
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>

Change-Id: I71f9050a7de9c7b07bcd7d96c8e5fc64a8565fb0
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

Change-Id: I89634989a7f360a30f7ed1bde4e67c93551ddfe4
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>