Revert of Fix dst bound reported by SkTileImageFilter

src/effects/SkXfermodeImageFilter.cpp

Index: src/effects/SkXfermodeImageFilter.cpp
diff --git a/src/effects/SkXfermodeImageFilter.cpp b/src/effects/SkXfermodeImageFilter.cpp
index 599fd42b12d0987bfa631f47d593d04f7b6296b2..f98247a2f47c98f8f1f209b37f7921b76abb4d55 100644
--- a/src/effects/SkXfermodeImageFilter.cpp
+++ b/src/effects/SkXfermodeImageFilter.cpp
@@ -105,18 +105,7 @@
     if (fMode) {
         fMode->toString(str);
     }
-    str->append(")");
-    if (this->getInput(0)) {
-        str->appendf("foreground: (");
-        this->getInput(0)->toString(str);
-        str->appendf(")");
-    }
-    if (this->getInput(1)) {
-        str->appendf("background: (");
-        this->getInput(1)->toString(str);
-        str->appendf(")");
-    }
-    str->append(")");
+    str->append("))");
 }
 #endif