Attempt at fixing tab dragging crash. I believe the crash is happening

chrome/browser/ui/views/tabs/base_tab_strip.cc

Index: chrome/browser/ui/views/tabs/base_tab_strip.cc
diff --git a/chrome/browser/ui/views/tabs/base_tab_strip.cc b/chrome/browser/ui/views/tabs/base_tab_strip.cc
index e7e220d4f543bf4b4bbb8cafed805ac3c2b4d56b..c07c22d433359de11834b782ead81fe0ec4dbda6 100644
--- a/chrome/browser/ui/views/tabs/base_tab_strip.cc
+++ b/chrome/browser/ui/views/tabs/base_tab_strip.cc
@@ -343,6 +343,10 @@ void BaseTabStrip::MaybeStartDrag(
   TabStripSelectionModel selection_model;
   if (!original_selection.IsSelected(model_index))
     selection_model.Copy(original_selection);
+  // Delete the existing DragController before creating a new one. We do this as
+  // creating the DragController remembers the TabContents delegates and we need
+  // to make sure the existing DragController isn't still a delegate.
+  drag_controller_.reset();
   drag_controller_.reset(TabDragController::Create(
       this, tab, tabs, gfx::Point(x, y), tab->GetMirroredXInView(event.x()),
       selection_model));