Fix recursive computation of filter bounds for drop shadow,

src/effects/SkBlurImageFilter.cpp

Index: src/effects/SkBlurImageFilter.cpp
diff --git a/src/effects/SkBlurImageFilter.cpp b/src/effects/SkBlurImageFilter.cpp
index 71bc8114dfd9d85b3d0cab75077baab563572e37..8787ccec8c16d655442c4a924aaf61b5a1c6b5c8 100644
--- a/src/effects/SkBlurImageFilter.cpp
+++ b/src/effects/SkBlurImageFilter.cpp
@@ -253,13 +253,13 @@ void SkBlurImageFilter::computeFastBounds(const SkRect& src, SkRect* dst) const
 bool SkBlurImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
                                        SkIRect* dst) const {
     SkIRect bounds = src;
-    if (getInput(0) && !getInput(0)->filterBounds(src, ctm, &bounds)) {
-        return false;
-    }
     SkVector sigma = SkVector::Make(fSigma.width(), fSigma.height());
     ctm.mapVectors(&sigma, 1);
     bounds.outset(SkScalarCeilToInt(SkScalarMul(sigma.x(), SkIntToScalar(3))),
                   SkScalarCeilToInt(SkScalarMul(sigma.y(), SkIntToScalar(3))));
+    if (getInput(0) && !getInput(0)->filterBounds(bounds, ctm, &bounds)) {
+        return false;
+    }
     *dst = bounds;
     return true;
 }