Revert "Fix external SkImageFilter caching with clips."

src/core/SkImageFilter.cpp

Index: src/core/SkImageFilter.cpp
diff --git a/src/core/SkImageFilter.cpp b/src/core/SkImageFilter.cpp
index 4c4b56beace2f60b9ff858e70c76cd6c1f3b2cd7..6356c1a5dd0ab33fb9d49f9baf813631317f44f8 100644
--- a/src/core/SkImageFilter.cpp
+++ b/src/core/SkImageFilter.cpp
@@ -122,16 +122,6 @@ bool SkImageFilter::filterBounds(const SkIRect& src, const SkMatrix& ctm,
                                  SkIRect* dst) const {
     SkASSERT(&src);
     SkASSERT(dst);
-    if (SkImageFilter::GetExternalCache()) {
-        /*
-         *  When the external cache is active, do not intersect the saveLayer
-         *  bounds with the clip bounds. This is so that the cached result
-         *  is always the full size of the primitive's bounds,
-         *  regardless of the clip active on first draw.
-         */
-        *dst = SkIRect::MakeLargest();
-        return true;
-    }
     return this->onFilterBounds(src, ctm, dst);
 }