Plumb event flags (shift/alt/ctrl modifiers) for drag/drop events to WebKit.

chrome/browser/automation/testing_automation_provider.cc

Index: chrome/browser/automation/testing_automation_provider.cc
diff --git a/chrome/browser/automation/testing_automation_provider.cc b/chrome/browser/automation/testing_automation_provider.cc
index dc3d02ffb76339fbd264d03c3e5deade5f3cb7ef..08613f4fde5b50bac90802cd3b3bce70c50949b3 100644
--- a/chrome/browser/automation/testing_automation_provider.cc
+++ b/chrome/browser/automation/testing_automation_provider.cc
@@ -1196,9 +1196,9 @@ void TestingAutomationProvider::DragAndDropFilePaths(
 
   view->DragTargetDragEnter(
       drop_data, client, screen,
-      static_cast<WebKit::WebDragOperationsMask>(operations));
+      static_cast<WebKit::WebDragOperationsMask>(operations), 0);
   new DragTargetDropAckNotificationObserver(this, reply_message);
-  view->DragTargetDrop(client, screen);
+  view->DragTargetDrop(client, screen, 0);
 }
 
 void TestingAutomationProvider::GetTabCount(int handle, int* tab_count) {