Need to implement LineStyle for Mac. r=buster b=34870

gfx/public/nsRenderingContextImpl.h

@@ -42,9 +42,10 @@ public:
 
 
 protected:
-  nsTransform2D		  *mTranMatrix;		// The rendering contexts transformation matrix
-  int               mAct;		        // number of active edges 
-  Edge              *mActive;	      // active edge list:edges crossing scanline y
+  nsTransform2D		  *mTranMatrix;				// The rendering contexts transformation matrix
+  nsLineStyle       mLineStyle;					// The current linestyle, currenly used on mac, other platfroms to follow
+  int               mAct;		        		// number of active edges 
+  Edge              *mActive;	      		// active edge list:edges crossing scanline y
 
 public:
   nsRenderingContextImpl();