Image filters: optimize crop rect application

src/effects/SkColorFilterImageFilter.cpp

Index: src/effects/SkColorFilterImageFilter.cpp
diff --git a/src/effects/SkColorFilterImageFilter.cpp b/src/effects/SkColorFilterImageFilter.cpp
index beb3138c84e3bebea4846607883734f640daeeed..a5904ea60b672d4c7041c88c9baa0fff2c3c183b 100644
--- a/src/effects/SkColorFilterImageFilter.cpp
+++ b/src/effects/SkColorFilterImageFilter.cpp
@@ -106,11 +106,8 @@ bool SkColorFilterImageFilter::onIsColorFilterNode(SkColorFilter** filter) const
     return false;
 }
 
-bool SkColorFilterImageFilter::canComputeFastBounds() const {
-    if (fColorFilter->affectsTransparentBlack()) {
-        return false;
-    }
-    return INHERITED::canComputeFastBounds();
+bool SkColorFilterImageFilter::affectsTransparentBlack() const {
+    return fColorFilter->affectsTransparentBlack();
 }
 
 #ifndef SK_IGNORE_TO_STRING