Add rotation APIs in radians to SkCanvas, SkMatrix

include/core/SkCanvas.h

Index: include/core/SkCanvas.h
diff --git a/include/core/SkCanvas.h b/include/core/SkCanvas.h
index 7235efb2f0a9cd3b23132541d9c695b0c81e1704..4709f40bcaa49d18eb326e77f2d06d4a4194a530 100644
--- a/include/core/SkCanvas.h
+++ b/include/core/SkCanvas.h
@@ -338,6 +338,12 @@ public:
     */
     virtual bool rotate(SkScalar degrees);
 
+    /** Preconcat the current matrix with the specified rotation.
+        @param degrees  The amount to rotate, in radians

[bsalomon, 2014/02/24 17:35:56]

The param is called "radians".

+        returns true if the operation succeeded (e.g. did not overflow)
+    */
+    virtual bool rotateRadians(SkScalar radians);
+
     /** Preconcat the current matrix with the specified skew.
         @param sx   The amount to skew in X
         @param sy   The amount to skew in Y