Update constructors view when switching perspectives

Constructors view is updated whenever allocation or summary perspective is selected.

BUG=277984
R=alph@chromium.org

Review URL: https://codereview.chromium.org/198833008

git-svn-id: svn://svn.chromium.org/blink/trunk@169524 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/devtools/front_end/HeapSnapshotDataGrids.js

@@ -769,6 +769,13 @@ WebInspector.HeapSnapshotConstructorsDataGrid.prototype = {
         this.snapshot.nodeClassName(parseInt(id, 10), didGetClassName.bind(this));
     },
 
+    clear: function()
+    {
+        this._nextRequestedFilter = null;
+        this._lastFilter = null;
+        this.removeTopLevelNodes();
+    },
+
     setDataSource: function(snapshot)
     {
         this.snapshot = snapshot;

third_party/WebKit/Source/devtools/front_end/HeapSnapshotView.js

@@ -225,6 +225,7 @@ WebInspector.HeapSnapshotView.SummaryPerspective.prototype = {
         if (heapSnapshotView._trackingOverviewGrid) {
             heapSnapshotView._trackingOverviewGrid.show(heapSnapshotView.element, heapSnapshotView._splitView.element);
             heapSnapshotView._trackingOverviewGrid.update();
+            heapSnapshotView._trackingOverviewGrid._updateGrid();
         }
     },
 
@@ -386,6 +387,11 @@ WebInspector.HeapSnapshotView.AllocationPerspective.prototype = {
         heapSnapshotView._retainmentView.show(heapSnapshotView._splitView.sidebarElement());
         heapSnapshotView._splitView.show(this._allocationSplitView.sidebarElement());
         this._allocationSplitView.show(heapSnapshotView.element);
+
+        heapSnapshotView._constructorsDataGrid.clear();
+        var selectedNode = heapSnapshotView._allocationDataGrid.selectedNode;
+        if (selectedNode)
+            heapSnapshotView._constructorsDataGrid.setAllocationNodeId(selectedNode.allocationNodeId());
     },
 
     /**