Fix leak in drawBitmapNine

src/gpu/SkGpuDevice.cpp

Index: src/gpu/SkGpuDevice.cpp
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index ccfed2cfa7ec9f27581492325afeac6bacc3d19f..e6712c5fed7845e8123c9d7b4da1324106d28591 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -1513,7 +1513,7 @@ void SkGpuDevice::drawBitmapNine(const SkDraw& draw, const SkBitmap& bitmap, con
 
     GrTextureParams params = GrTextureParams::ClampNoFilter();
 
-    GrTexture* texture(GrRefCachedBitmapTexture(this->context(), bitmap, params));
+    SkAutoTUnref<GrTexture> texture(GrRefCachedBitmapTexture(this->context(), bitmap, params));
     if (nullptr == texture) {
         return;
     }