Buffer fix for VkProgram caching

src/gpu/vk/GrVkProgramDataManager.h

Index: src/gpu/vk/GrVkProgramDataManager.h
diff --git a/src/gpu/vk/GrVkProgramDataManager.h b/src/gpu/vk/GrVkProgramDataManager.h
index 3baef0a7428bbca7a51d2b65a520a60d85558008..bd0d68838112361b0f934a6964631983db950a80 100644
--- a/src/gpu/vk/GrVkProgramDataManager.h
+++ b/src/gpu/vk/GrVkProgramDataManager.h
@@ -63,6 +63,8 @@ private:
     template<int N> inline void setMatrices(UniformHandle, int arrayCount,
                                             const float matrices[]) const;
 
+    void* getBufferPtrAndMarkDirty(const Uniform& uni) const;
+
     uint32_t fVertexUniformSize;
     uint32_t fFragmentUniformSize;
 
@@ -70,6 +72,8 @@ private:
 
     mutable SkAutoMalloc fVertexUniformData;
     mutable SkAutoMalloc fFragmentUniformData;
+    mutable bool         fVertexUniformsDirty;
+    mutable bool         fFragmentUniformsDirty;
 };
 
 #endif