Purge cached resources on SkImage destruction.

src/image/SkImage_Generator.cpp

Index: src/image/SkImage_Generator.cpp
diff --git a/src/image/SkImage_Generator.cpp b/src/image/SkImage_Generator.cpp
index 2bb508f46d11fa24007373189e8c69a5dc26dae9..0f1fa3692c8e3dd7a88b46acdc74642555a16e54 100644
--- a/src/image/SkImage_Generator.cpp
+++ b/src/image/SkImage_Generator.cpp
@@ -77,11 +77,11 @@ SkData* SkImage_Generator::onRefEncoded() const {
 }
 
 bool SkImage_Generator::getROPixels(SkBitmap* bitmap) const {
-    return fCache->lockAsBitmap(bitmap);
+    return fCache->lockAsBitmap(bitmap, this);
 }
 
 GrTexture* SkImage_Generator::asTextureRef(GrContext* ctx, SkImageUsageType usage) const {
-    return fCache->lockAsTexture(ctx, usage);
+    return fCache->lockAsTexture(ctx, usage, this);
 }
 
 SkImage* SkImage::NewFromGenerator(SkImageGenerator* generator, const SkIRect* subset) {