Revert "Fix external SkImageFilter caching with clips."

This reverts commit ffa9b500d7e83e7dddf6a8902f47c4355b608c30.

R=reed@google.com
TBR=reed@google.com
NOTRY=True
NOTREECHECKS=True

Author: senorblanco@chromium.org

Review URL: https://codereview.chromium.org/340413004
diff --git a/src/core/SkImageFilter.cpp b/src/core/SkImageFilter.cpp
index 4c4b56b..6356c1a 100644
--- a/src/core/SkImageFilter.cpp
+++ b/src/core/SkImageFilter.cpp
@@ -122,16 +122,6 @@
                                  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);
 }