Make GrMatrix an alias of SkMatrix. Add new methods to SkMatrix.

Review URL: http://codereview.appspot.com/4538043/

Checked in on behalf of reed@ with some additional work (remove the do-nother sk->gr matrix converter).



git-svn-id: http://skia.googlecode.com/svn/trunk@1289 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/include/GrTextContext.h b/gpu/include/GrTextContext.h
index a598251..b7a690e 100644
--- a/gpu/include/GrTextContext.h
+++ b/gpu/include/GrTextContext.h
@@ -20,9 +20,9 @@
 
 #include "GrGlyph.h"
 #include "GrPaint.h"
+#include "GrMatrix.h"
 
 struct GrGpuTextVertex;
-class GrMatrix;
 class GrContext;
 class GrTextStrike;
 class GrFontScaler;