Results 15 issues of fujunwei

Test Environments: • DNNL and Discrete IE-MKLDNN tested on [e306860](http://powerbuilder.sh.intel.com/project/webnn/nightly/e306860/win_x64_SUCCEED/) • Integrated IE-MKLDNN tested on [6f1b378](http://powerbuilder.sh.intel.com/project/webnn/nightly/6f1b378/win_x64_SUCCEED/) • Native OpenVINO IE-MKLDNN tested with openvino toolkit 2020.3 • CPU: Intel i7-1065G7 CPU...

["add with two inputs" and "add broadcast"](https://github.com/intel/webml-polyfill/blob/master/test/v2/cts/add.js) test cases can't run as expected after changing to V1 API.

seeing @BruceDai 's comments: > There’s issue on Lenovo (Edition: Windows 10 Home Insider Preview, OS build: 20161.100, not sure whether this Edition is the root cause), but it’s OK...

Change [OperandValueInfo.length/offset](https://github.com/otcshare/chromium-src/blob/webml/services/ml/public/mojom/model.mojom#L33) from uint32 to size_t because DomArrayBuffer will only support size_t with [byteLengthAsSizeT](https://source.chromium.org/chromium/chromium/src/+/master:third_party/blink/renderer/core/typed_arrays/dom_array_buffer_view.h;l=111;drc=6895ab957da7b2f92eb61656f80b58924bdc05db;bpv=0;bpt=1?originalUrl=https:%2F%2Fcs.chromium.org%2F).

![Capture_1](https://user-images.githubusercontent.com/7856909/84101854-863d9380-aa41-11ea-807c-e18e8b699302.PNG) The output shape of tflite model is {1, 224, 224} that should be {224, 224, 1} for NHWC, that also can be {1, 224, 224, 1} align with [OpenVINO...

https://devblogs.microsoft.com/directx/directx-heart-linux/

It's hard to maintain Inference Engine Code for POC that is integrated to Chromium source code, it's better to go down the implementation of building CNNNetwork whether using NN builder...