Add whitelist parameter to refEncodedData

src/core/SkImageCacherator.cpp

Index: src/core/SkImageCacherator.cpp
diff --git a/src/core/SkImageCacherator.cpp b/src/core/SkImageCacherator.cpp
index 7b5ff2267774463584c525bdd0f2cc5ee3fcbd8a..457aecd35e0e393b7cc1728122b8307f2d68aac3 100644
--- a/src/core/SkImageCacherator.cpp
+++ b/src/core/SkImageCacherator.cpp
@@ -25,6 +25,24 @@
 #include "SkGrPriv.h"
 #endif
 
+bool SkEncodedFormatQuery_Gpu::supportedFormat(SkEncodedFormat format) {
+#if SK_SUPPORT_GPU
+    return GrIsCompressedFormatPossiblySupported(fCtx, format);
+#else
+    return false;
+#endif
+}
+
+bool SkEncodedFormatQuery_Gpu::supportedFormatFromData(const void* data, size_t length) {
+#if SK_SUPPORT_GPU
+    return GrIsCompressedTextureDataPossiblySupported(fCtx, data, length);
+#else
+    return false;
+#endif
+}
+
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
 SkImageCacherator* SkImageCacherator::NewFromGenerator(SkImageGenerator* gen,
                                                        const SkIRect* subset) {
     if (!gen) {
@@ -70,8 +88,15 @@ SkImageCacherator::SkImageCacherator(SkImageGenerator* gen, const SkImageInfo& i
 {}
 
 SkData* SkImageCacherator::refEncoded(GrContext* ctx) {
+    SkEncodedFormatQuery* query = nullptr;
+#if SK_SUPPORT_GPU
+    SkEncodedFormatQuery_Gpu gpuQuery(ctx);
+    if (ctx) {
+        query = &gpuQuery;
+    }
+#endif
     ScopedGenerator generator(this);
-    return generator->refEncodedData(ctx);
+    return generator->refEncodedData(query);
 }
 
 static bool check_output_bitmap(const SkBitmap& bitmap, uint32_t expectedID) {