Omnibox should accept and navigate URLs dropped using drag and drop.

ui/views/controls/textfield/textfield_controller.cc

Index: ui/views/controls/textfield/textfield_controller.cc
diff --git a/ui/views/controls/textfield/textfield_controller.cc b/ui/views/controls/textfield/textfield_controller.cc
index 6d3b7ac9c96de90899cb51ea71fecca80cd60995..32936ce819f1984c74c48f32b99579760955d6d1 100644
--- a/ui/views/controls/textfield/textfield_controller.cc
+++ b/ui/views/controls/textfield/textfield_controller.cc
@@ -4,8 +4,14 @@
 
 #include "ui/views/controls/textfield/textfield_controller.h"
 
+#include "ui/base/dragdrop/drag_drop_types.h"
+
 namespace views {
 
+int TextfieldController::OnDrop(const ui::OSExchangeData& data) {
+  return ui::DragDropTypes::DRAG_NONE;
+}
+
 bool TextfieldController::IsCommandIdEnabled(int command_id) const {
   return false;
 }