WebGPU is a Render Hardware Interface built on top of the various APIs provided by the driver/OS depending on your platform. This duplicated development effort is made once by the web browsers and made available through the webgpu.h header that they provide.
Dawn is an open-source and cross-platform implementation of the WebGPU standard, lead by Google. More precisely, it implements webgpu.h that is a one-to-one mapping with the WebGPU IDL.
Streamline is an application profiler that can capture data from multiple sources, including Program Counters (PC), samples from the hardware Performance Monitoring Unit (PMU) counters in the Arm CPU, Arm® Mali™ GPUs, and Arm Immortalis™ GPUs.