Modified media_opt and qm_select to allow for robustness settings

based on the content metrics. Re-organized the class structure in qm_select
into a resolution class and robustness settings class, both derived from
a main (qm/content analysis) class.
Review URL: http://webrtc-codereview.appspot.com/55006

git-svn-id: http://webrtc.googlecode.com/svn/trunk@188 4adac7df-926f-26a2-2b94-8c16560cd09d

src/modules/video_coding/main/source/media_optimization.h

@@ -159,7 +159,7 @@ private:
     * verify if QM settings differ from default, i.e. if an update is required
     * Compute actual values, as will be sent to the encoder
     */
-    bool QMUpdate(VCMQualityMode* qm);
+    bool QMUpdate(VCMResolutionScale* qm);
     /**
     * check if we should make a QM change
     * will return 1 if yes, 0 otherwise
@@ -207,7 +207,7 @@ private:
     WebRtc_UWord32                    _deltaFrameCnt;
 
     VCMContentMetricsProcessing*      _content;
-    VCMQmSelect*                      _qms;
+    VCMQmResolution*                  _qmResolution;
 
     WebRtc_Word64                     _lastQMUpdateTime;
     WebRtc_Word64                     _lastChangeTime; // content or user triggered