[XProf: trace viewer] Add data re-fetching logic to Trace Viewer v2 timeline. #2088
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…imeline. This change introduces a mechanism to request more trace event data when the user navigates or zooms in the timeline. The timeline checks if the currently visible time range is within a "preserved" area of the already loaded data. If not, it dispatches a "request_data" event to fetch a larger "fetch" area around the current viewport. PiperOrigin-RevId: 845951775
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[XProf: trace viewer] Add data re-fetching logic to Trace Viewer v2 timeline.
This change introduces a mechanism to request more trace event data when the user navigates or zooms in the timeline. The timeline checks if the currently visible time range is within a "preserved" area of the already loaded data. If not, it dispatches a "request_data" event to fetch a larger "fetch" area around the current viewport.