API Review: ProcessId for ProcessFailedEventArgs

[prija-microsoft]

Add ProcessId property to CoreWebView2ProcessFailedEventArgs4

This API extends ProcessFailedEventArgs to include the process ID of the failed process, enabling applications to:

• Correlate process failures with running process data from the ProcessInfo API
• Collect process-specific diagnostic information for logging and telemetry
• Analyze crash dumps for specific processes
• Better track and respond to failures in multi-renderer scenarios

The process ID is only available if the process has started and ended unexpectedly. For other failure types, the process ID value will be 0.

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[Copilot]

Pull Request Overview

This PR adds a ProcessId property to CoreWebView2ProcessFailedEventArgs to expose the process ID of failed WebView2 processes. This enhancement enables applications to correlate process failures with runtime process information, collect process-specific diagnostics, and better handle failures in multi-renderer scenarios.

Key Changes:

• Added ICoreWebView2ProcessFailedEventArgs4 interface with ProcessId property
• The process ID returns 0 for failure types where the process never started successfully
• Provides correlation capability with existing ProcessInfo API

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[Copilot]

Corrected 'process id' to 'process ID' for consistency with industry standard capitalization.

Suggested change

	WebView2 provides applications with the [ProcessFailed](https://learn.microsoft.com/microsoft-edge/webview2/reference/win32/icorewebview2?view=webview2-1.0.705.50#add_processfailed) event so they can react accordingly when a process failure occurs. However, this event does not currently provide the process id of the failed process. This is particularly problematic when running multiple renderers, it becomes difficult for the application to determine which process to address.
	In this document we describe an extended version of the [ProcessFailedEventArgs](https://learn.microsoft.com/en-us/microsoft-edge/webview2/reference/win32/icorewebview2processfailedeventargs?view=webview2-1.0.2151.40), which includes the process id. This enables the host application to collect additional information about the process failure whether a renderer, GPU, or even the browser process.
	WebView2 provides applications with the [ProcessFailed](https://learn.microsoft.com/microsoft-edge/webview2/reference/win32/icorewebview2?view=webview2-1.0.705.50#add_processfailed) event so they can react accordingly when a process failure occurs. However, this event does not currently provide the process ID of the failed process. This is particularly problematic when running multiple renderers, it becomes difficult for the application to determine which process to address.
	In this document we describe an extended version of the [ProcessFailedEventArgs](https://learn.microsoft.com/en-us/microsoft-edge/webview2/reference/win32/icorewebview2processfailedeventargs?view=webview2-1.0.2151.40), which includes the process ID. This enables the host application to collect additional information about the process failure whether a renderer, GPU, or even the browser process.

[Copilot]

Corrected 'process id' to 'process ID' for consistency with industry standard capitalization.

Suggested change

	WebView2 provides applications with the [ProcessFailed](https://learn.microsoft.com/microsoft-edge/webview2/reference/win32/icorewebview2?view=webview2-1.0.705.50#add_processfailed) event so they can react accordingly when a process failure occurs. However, this event does not currently provide the process id of the failed process. This is particularly problematic when running multiple renderers, it becomes difficult for the application to determine which process to address.
	In this document we describe an extended version of the [ProcessFailedEventArgs](https://learn.microsoft.com/en-us/microsoft-edge/webview2/reference/win32/icorewebview2processfailedeventargs?view=webview2-1.0.2151.40), which includes the process id. This enables the host application to collect additional information about the process failure whether a renderer, GPU, or even the browser process.
	WebView2 provides applications with the [ProcessFailed](https://learn.microsoft.com/microsoft-edge/webview2/reference/win32/icorewebview2?view=webview2-1.0.705.50#add_processfailed) event so they can react accordingly when a process failure occurs. However, this event does not currently provide the process ID of the failed process. This is particularly problematic when running multiple renderers, it becomes difficult for the application to determine which process to address.
	In this document we describe an extended version of the [ProcessFailedEventArgs](https://learn.microsoft.com/en-us/microsoft-edge/webview2/reference/win32/icorewebview2processfailedeventargs?view=webview2-1.0.2151.40), which includes the process ID. This enables the host application to collect additional information about the process failure whether a renderer, GPU, or even the browser process.

[david-risney]

We have an existing CoreWebView2ProcessInfo type and a CoreWebView2ProcessExtendedInfo type. Can we use one of those instead? Preferably the CoreWebView2ProcessExtendedInfo if you have the required info in the implementation, or the CoreWebView2ProcessInfo otherwise. If you don't have info for either one then a Int32 ProcessId is OK.

Suggested change

	Int32 ProcessId { get; };
	CoreWebView2ProcessExtendedInfo ProcessExtendedInfo { get; };

[david-risney]

Please limit line lengths to 80 or 100 characters

[david-risney]

Would be good to just list the process failure kinds where the process ID will be valid and where it won't.

Suggested change

	The process ID is only available if the process has started and ended unexpectedly. For other failure types where the process was never successfully started, the process ID value will be `0`.
	The process ID is only available if the process has started successfully and ended unexpectedly for the failure types X, Y, and Z. For other failure types, the process ID value will be `0`.

[david-risney]

This is sort of duplicate info as above but stated in a different way. Please remove or make sure they match.

[david-risney]

Please state which failure kinds specifically we will have the process ID