Mac Support for drag-and-drop tests that start dragging via mouse simulation.

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index 1e2aca4c76441ff226d142cdab0173c9ae168aaa..d3d98079b095c7f4bec39ba42cd9368bc4dcb7c1 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -394,6 +394,8 @@ if (!is_android) {
       "../browser/ui/startup/startup_browser_creator_interactive_uitest.cc",
       "../browser/ui/translate/translate_bubble_test_utils.h",
       "../browser/ui/views/accessibility/navigation_accessibility_uitest_win.cc",
+      "../browser/ui/views/drag_and_drop_interactive_uitest.cc",
+      "../browser/ui/views/drag_and_drop_interactive_uitest.h",
       "../browser/ui/webui/options/language_dictionary_interactive_uitest.cc",
       "../browser/ui/webui/options/language_options_interactive_uitest.cc",
       "//ui/base/clipboard/clipboard_android_unittest.cc",
@@ -501,7 +503,8 @@ if (!is_android) {
     ]
 
     if (use_aura) {
-      sources += [ "../browser/ui/views/drag_and_drop_interactive_uitest.cc" ]
+      sources +=
+          [ "../browser/ui/views/drag_and_drop_interactive_uitest_aura.cc" ]
     }
 
     if (toolkit_views) {