aura: Add flag to indicate if a drag session is started with touch or mouse.

ui/views/widget/widget.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/views/widget/widget.h"
 
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/utf_string_conversions.h"
 #include "ui/base/events/event.h"
@@ skipping 690 matching lines @@
     // TODO(oshima): Fix GetTopLevelWidget() to return NULL
     // if there is no toplevel. We probably need to add GetTopMostWidget()
     // to replace some use cases.
     return (toplevel && toplevel != this) ? toplevel->GetInputMethod() : NULL;
   }
 }
 
 void Widget::RunShellDrag(View* view,
                           const ui::OSExchangeData& data,
                           const gfx::Point& location,
-                          int operation) {
+                          int operation,
+                          ui::DragDropTypes::DragEventSource source) {
   dragged_view_ = view;
-  native_widget_->RunShellDrag(view, data, location, operation);
+  native_widget_->RunShellDrag(view, data, location, operation, source);
   // If the view is removed during the drag operation, dragged_view_ is set to
   // NULL.
   if (view && dragged_view_ == view) {
     dragged_view_ = NULL;
     view->OnDragDone();
   }
 }
 
 void Widget::SchedulePaintInRect(const gfx::Rect& rect) {
   native_widget_->SchedulePaintInRect(rect);
@@ skipping 640 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // internal::NativeWidgetPrivate, NativeWidget implementation:
 
 internal::NativeWidgetPrivate* NativeWidgetPrivate::AsNativeWidgetPrivate() {
   return this;
 }
 
 }  // namespace internal
 }  // namespace views