Add resource provider flag to avoid client-side buffers

src/gpu/vk/GrVkGpuCommandBuffer.cpp

Index: src/gpu/vk/GrVkGpuCommandBuffer.cpp
diff --git a/src/gpu/vk/GrVkGpuCommandBuffer.cpp b/src/gpu/vk/GrVkGpuCommandBuffer.cpp
index 8ee83511a6545d831b07a2c854ceb2d405ced875..351fbbf53607c14a2125a35ba976b570efd96f69 100644
--- a/src/gpu/vk/GrVkGpuCommandBuffer.cpp
+++ b/src/gpu/vk/GrVkGpuCommandBuffer.cpp
@@ -295,6 +295,7 @@ void GrVkGpuCommandBuffer::bindGeometry(const GrPrimitiveProcessor& primProc,
     // When a command buffer is submitted to a queue, there is an implicit memory barrier that
     // occurs for all host writes. Additionally, BufferMemoryBarriers are not allowed inside of
     // an active RenderPass.
+    SkASSERT(!mesh.vertexBuffer()->isCPUBacked());
     GrVkVertexBuffer* vbuf;
     vbuf = (GrVkVertexBuffer*)mesh.vertexBuffer();
     SkASSERT(vbuf);
@@ -303,6 +304,7 @@ void GrVkGpuCommandBuffer::bindGeometry(const GrPrimitiveProcessor& primProc,
     fCommandBuffer->bindVertexBuffer(fGpu, vbuf);
 
     if (mesh.isIndexed()) {
+        SkASSERT(!mesh.indexBuffer()->isCPUBacked());
         GrVkIndexBuffer* ibuf = (GrVkIndexBuffer*)mesh.indexBuffer();
         SkASSERT(ibuf);
         SkASSERT(!ibuf->isMapped());