Make GrFragmentProcessor be non-refcounted and use std::unique_ptr.

Change-Id: I985e54a071338e99292a5aa2f42c92bc115b4008
Reviewed-on: https://skia-review.googlesource.com/32760
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
diff --git a/src/shaders/SkLocalMatrixShader.h b/src/shaders/SkLocalMatrixShader.h
index 3ae44cf..407c30d 100644
--- a/src/shaders/SkLocalMatrixShader.h
+++ b/src/shaders/SkLocalMatrixShader.h
@@ -28,7 +28,7 @@
     }
 
 #if SK_SUPPORT_GPU
-    sk_sp<GrFragmentProcessor> asFragmentProcessor(const AsFPArgs&) const override;
+    std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const AsFPArgs&) const override;
 #endif
 
     sk_sp<SkShader> makeAsALocalMatrixShader(SkMatrix* localMatrix) const override {