Clicking a tracing marker in the header should focus a heavy callstack within that range about profiler HOT 8 OPEN

diff --git a/src/actions/profile-view.js b/src/actions/profile-view.js
index b1e6a745..eb19b2d5 100644
--- a/src/actions/profile-view.js
+++ b/src/actions/profile-view.js
@@ -212,6 +212,16 @@ export function updateProfileSelection(selection: ProfileSelection): Action {
   };
 }
 
+export function selectHeaviestCallNodeInSelection(): ThunkAction {
+  return (dispatch, getState) => {
+    // Get the call tree, and find the heaviest sample.
+    // Then computed the expandedCallNodePath and selectedCallNode
+
+    dispatch(changeSelectedCallNode( ... ));
+    dispatch(changeExpandedCallNodes( ... ));
+  };
+}
+
 export function addRangeFilter(start: number, end: number): Action {
   return {
     type: 'ADD_RANGE_FILTER',
diff --git a/src/components/header/ProfileThreadHeaderBar.js b/src/components/header/ProfileThreadHeaderBar.js
index c2c698e7..08fdc56b 100644
--- a/src/components/header/ProfileThreadHeaderBar.js
+++ b/src/components/header/ProfileThreadHeaderBar.js
@@ -27,7 +27,10 @@ import type {
 } from '../../types/profile-derived';
 import type { State } from '../../types/reducers';
 
-import { updateProfileSelection } from '../../actions/profile-view';
+import {
+  updateProfileSelection,
+  selectHeaviestCallNodeInSelection,
+} from '../../actions/profile-view';
 
 type Props = {
   threadIndex: ThreadIndex,
@@ -45,6 +48,7 @@ type Props = {
   processDetails: string,
   changeSelectedThread: ThreadIndex => void,
   updateProfileSelection: typeof updateProfileSelection,
+  selectHeaviestCallNodeInSelection: typeof selectHeaviestCallNodeInSelection,
   changeSelectedCallNode: (IndexIntoCallNodeTable, CallNodePath) => void,
 };
 
@@ -106,14 +110,16 @@ class ProfileThreadHeaderBar extends PureComponent<Props> {
       rangeEnd,
       updateProfileSelection,
       changeSelectedThread,
+      selectHeaviestCallNodeInSelection,
     } = this.props;
+    changeSelectedThread(threadIndex);
     updateProfileSelection({
       hasSelection: true,
       isModifying: false,
       selectionStart: Math.max(rangeStart, start),
       selectionEnd: Math.min(rangeEnd, end),
     });
-    changeSelectedThread(threadIndex);
+    selectHeaviestCallNodeInSelection();
   }
 
   _onMarkerSelect(/* markerIndex */) {}