[RPP] Force tab targetType in trace_app

This is required for some features to work, such as linkifying the
console source location in the bottom-up / call-tree tables. The short
summary is that `primaryPageTarget()` does not return the correct target
for rehydrated connections unless the first / root target is of type
tab, which breaks linkifying.

Bug: 427455148
Change-Id: I62e656d9f92892d8b051e0c7b98c663b432499d1
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/7037208
Reviewed-by: Paul Irish <[email protected]>
Auto-Submit: Connor Clark <[email protected]>
Commit-Queue: Connor Clark <[email protected]>

Author: Connor Clark

front_end/entrypoints/inspector_main/InspectorMain.ts

@@ -65,7 +65,9 @@ export class InspectorMainImpl implements Common.Runnable.Runnable {
     await SDK.Connections.initMainConnection(async () => {
       const type = Root.Runtime.Runtime.queryParam('v8only') ?
           SDK.Target.Type.NODE :
-          (Root.Runtime.Runtime.queryParam('targetType') === 'tab' ? SDK.Target.Type.TAB : SDK.Target.Type.FRAME);
+          (Root.Runtime.Runtime.queryParam('targetType') === 'tab' || Root.Runtime.Runtime.isTraceApp() ?
+               SDK.Target.Type.TAB :
+               SDK.Target.Type.FRAME);
       // TODO(crbug.com/1348385): support waiting for debugger with tab target.
       const waitForDebuggerInPage =
           type === SDK.Target.Type.FRAME && Root.Runtime.Runtime.queryParam('panel') === 'sources';