Lock pixels again after dummy reset of pixel ref in SkBitmapRegionCodec

tools/android/SkBitmapRegionCodec.cpp

Index: tools/android/SkBitmapRegionCodec.cpp
diff --git a/tools/android/SkBitmapRegionCodec.cpp b/tools/android/SkBitmapRegionCodec.cpp
index 7c3c2471b0cbf7db75e778b399709ac4d169a521..415b60c5ab354e9ddeac605585e02b4e68244c30 100644
--- a/tools/android/SkBitmapRegionCodec.cpp
+++ b/tools/android/SkBitmapRegionCodec.cpp
@@ -129,6 +129,7 @@ bool SkBitmapRegionCodec::decodeRegion(SkBitmap* bitmap, SkBRDAllocator* allocat
     size_t rowBytes = pr->rowBytes();
     bitmap->setInfo(outInfo, rowBytes);
     bitmap->setPixelRef(pr)->unref();
+    bitmap->lockPixels();
     SkCodec::Result result = fCodec->getAndroidPixels(decodeInfo, dst, rowBytes, &options);
     if (SkCodec::kSuccess != result && SkCodec::kIncompleteInput != result) {
         SkCodecPrintf("Error: Could not get pixels.\n");