Change SkDecodingImageGenerator API

tests/CachedDecodingPixelRefTest.cpp

Index: tests/CachedDecodingPixelRefTest.cpp
diff --git a/tests/CachedDecodingPixelRefTest.cpp b/tests/CachedDecodingPixelRefTest.cpp
index f97e89361fab1b19d734fcdda64c9b959ba16295..5cec233a1b48150a390e5de5e2d3f1b67aa33e45 100644
--- a/tests/CachedDecodingPixelRefTest.cpp
+++ b/tests/CachedDecodingPixelRefTest.cpp
@@ -146,11 +146,11 @@ static void test_three_encodings(skiatest::Reporter* reporter,
 ////////////////////////////////////////////////////////////////////////////////
 static bool install_skCachingPixelRef(SkData* encoded, SkBitmap* dst) {
     return SkCachingPixelRef::Install(
-        SkNEW_ARGS(SkDecodingImageGenerator, (encoded)), dst);
+        SkNEW_ARGS(SkDecodingImageGenerator, (encoded, NULL)), dst);
 }
 static bool install_skDiscardablePixelRef(SkData* encoded, SkBitmap* dst) {
     // Use system-default discardable memory.
-    return SkDecodingImageGenerator::Install(encoded, dst, NULL);
+    return SkDecodingImageGenerator::Install(encoded, dst, NULL, NULL);
 }
 
 ////////////////////////////////////////////////////////////////////////////////