[Segment Anything][SAM ViT-B Decoder] Failed to execute 'constant' on 'MLGraphBuilder': This MLGraphBuilder has already built a graph

[JiangYueBook]

Repro Steps:

1. Launch latest Chrome Canary on Windows 11
   C:\Users\AppData\Local\Google\Chrome SxS\Application\chrome.exe" --enable-features=WebMachineLearningNeuralNetwork

2. Visit https://microsoft.github.io/webnn-developer-preview/demos/segment-anything/

3. Check demo loading logs

Actual Result:

   [Session Create] SAM ViT-B Decoder (FP16) failed, Failed to execute 'constant' on 'MLGraphBuilder': This MLGraphBuilder has already built a graph.

Environment:

Chrome Canary: 129.0.6617.0	Device	OS	CPU	GPU
Desktop	Windows 11 23H2	i7-12700	Nvidia 2080Ti

[ibelem]

Thanks for the report @JiangYueBook

• Canary 129.0.6615.0 PASS
• Canary 129.0.6617.0 FAIL / Failed to execute 'constant' on 'MLGraphBuilder': This MLGraphBuilder has already built a graph

This issue caused by Allow an MLGraphBuilder to build at most one MLGraph, @Honry will update WebNN EP in ONNX Runtime Web and I will update the ORT Web dists later in demo code.

@fdwr @Adele101

[fdwr]

@a-sully Oops, I guess there was some impact. I figured your change would be impact-free for the samples. @Honry Thank you for updating ORT. I guess the WebNN EP builds multiple partitions within the same graph using the same graphBuilder?

[Honry]

@Honry Thank you for updating ORT. I guess the WebNN EP builds multiple partitions within the same graph using the same graphBuilder?

Yes, I am fixing this.

[Honry]

@Honry Thank you for updating ORT. I guess the WebNN EP builds multiple partitions within the same graph using the same graphBuilder?

Yes, I am fixing this.

PR submitted, @fdwr, PTAL, thanks!