[DevTools] Rework Popover API

third_party/WebKit/Source/devtools/front_end/profiler/HeapSnapshotGridNodes.js

Index: third_party/WebKit/Source/devtools/front_end/profiler/HeapSnapshotGridNodes.js
diff --git a/third_party/WebKit/Source/devtools/front_end/profiler/HeapSnapshotGridNodes.js b/third_party/WebKit/Source/devtools/front_end/profiler/HeapSnapshotGridNodes.js
index 6ded00decb77399a3d41d5b0fa0aee01c3acdcd1..fe1ff3e18ff5fed3ee5c7f37b2927d70d0adab02 100644
--- a/third_party/WebKit/Source/devtools/front_end/profiler/HeapSnapshotGridNodes.js
+++ b/third_party/WebKit/Source/devtools/front_end/profiler/HeapSnapshotGridNodes.js
@@ -133,10 +133,10 @@ Profiler.HeapSnapshotGridNode = class extends DataGrid.DataGridNode {
 
   /**
    * @param {!SDK.Target} target
-   * @param {function(!SDK.RemoteObject)} callback
    * @param {string} objectGroupName
+   * @return {!Promise<!SDK.RemoteObject>}
    */
-  queryObjectContent(target, callback, objectGroupName) {
+  queryObjectContent(target, objectGroupName) {
   }
 
   /**
@@ -605,15 +605,18 @@ Profiler.HeapSnapshotGenericObjectNode = class extends Profiler.HeapSnapshotGrid
   /**
    * @override
    * @param {!SDK.Target} target
-   * @param {function(!SDK.RemoteObject)} callback
    * @param {string} objectGroupName
+   * @return {!Promise<!SDK.RemoteObject>}
    */
-  queryObjectContent(target, callback, objectGroupName) {
+  queryObjectContent(target, objectGroupName) {
+    var fulfill;
+    var promise = new Promise(x => fulfill = x);
+
     /**
      * @param {?SDK.RemoteObject} object
      */
     function onResult(object) {
-      callback(
+      fulfill(
           object ||
           target.runtimeModel.createRemoteObjectFromPrimitiveValue(Common.UIString('Preview is not available')));
     }
@@ -625,6 +628,7 @@ Profiler.HeapSnapshotGenericObjectNode = class extends Profiler.HeapSnapshotGrid
       onResult(null);
     else
       heapProfilerModel.objectForSnapshotObjectId(String(this.snapshotNodeId), objectGroupName).then(onResult);
+    return promise;
   }
 
   updateHasChildren() {