Plumb fast rectangle blur code into the skia mask filter

Review URL: https://codereview.chromium.org/12387099

git-svn-id: http://skia.googlecode.com/svn/trunk@8074 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/effects/SkBlurMask.h b/src/effects/SkBlurMask.h
index 5179b4b..4849ee7 100644
--- a/src/effects/SkBlurMask.h
+++ b/src/effects/SkBlurMask.h
@@ -11,6 +11,7 @@
 #define SkBlurMask_DEFINED
 
 #include "SkShader.h"
+#include "SkMask.h"
 
 class SkBlurMask {
 public:
@@ -30,7 +31,8 @@
 
     static bool BlurRect(SkMask *dst, const SkRect &src,
                          SkScalar radius, Style style,
-                         SkIPoint *margin = NULL);
+                         SkIPoint *margin = NULL, 
+                         SkMask::CreateMode createMode=SkMask::kComputeBoundsAndRenderImage_CreateMode);
     static bool Blur(SkMask* dst, const SkMask& src,
                      SkScalar radius, Style style, Quality quality,
                      SkIPoint* margin = NULL);