Get correct PLT measurement for Resource Prefetching for Mobile Web
The starting point of the PLT measurement for Resource Prefetching for Mobile Web is when the main resource request is created and sent out. Current implementation actually did not store the start time in the right data structure, leading to incorrect PLT measurement. This CL fixes this.
inflight_navigations_ stores the NavigationID. When measuring PLT, we need to use the navigation ID stored in inflight_navigations_, instead of using the newly created ones.
BUG=405690
Review URL: https://codereview.chromium.org/
1133493002
Cr-Commit-Position: refs/heads/master@{#329009}