add ImageGenerator::NewFromData to porting layer

BUG=skia:3275

Review URL: https://codereview.chromium.org/834633006

1 files changed, 7 insertions, 1 deletions

diff --git a/src/lazy/SkDiscardablePixelRef.cpp b/src/lazy/SkDiscardablePixelRef.cpp
index 84152ed188..4b7d47b94d 100644
--- a/src/lazy/SkDiscardablePixelRef.cpp
+++ b/src/lazy/SkDiscardablePixelRef.cpp
@@ -116,7 +116,13 @@ bool SkInstallDiscardablePixelRef(SkImageGenerator* generator, SkBitmap* dst,
     return true;
 }
 
-// This is the public API
+// These are the public API
+
 bool SkInstallDiscardablePixelRef(SkImageGenerator* generator, SkBitmap* dst) {
     return SkInstallDiscardablePixelRef(generator, dst, NULL);
 }
+
+bool SkInstallDiscardablePixelRef(SkData* encoded, SkBitmap* dst) {
+    SkImageGenerator* generator = SkImageGenerator::NewFromData(encoded);
+    return generator ? SkInstallDiscardablePixelRef(generator, dst, NULL) : false;
+}