Hook up HTML5 effectAllowed and dragEffect on Windows.

chrome/browser/views/tab_contents/tab_contents_drag_win.cc

Index: chrome/browser/views/tab_contents/tab_contents_drag_win.cc
diff --git a/chrome/browser/views/tab_contents/tab_contents_drag_win.cc b/chrome/browser/views/tab_contents/tab_contents_drag_win.cc
index 59ddfd300acf8b4c4c5bea4730e057252778d53f..03497c84bccbc9317074fa171ead2c58ede84056 100644
--- a/chrome/browser/views/tab_contents/tab_contents_drag_win.cc
+++ b/chrome/browser/views/tab_contents/tab_contents_drag_win.cc
@@ -26,6 +26,9 @@
 #include "webkit/glue/webdropdata.h"
 
 using WebKit::WebDragOperationsMask;
+using WebKit::WebDragOperationCopy;
+using WebKit::WebDragOperationLink;
+using WebKit::WebDragOperationMove;
 
 namespace {
 
@@ -58,6 +61,17 @@ LRESULT CALLBACK MsgFilterProc(int code, WPARAM wparam, LPARAM lparam) {
   return CallNextHookEx(msg_hook, code, wparam, lparam);
 }
 
+DWORD WebDragOpToWinDragOp(WebDragOperationsMask op) {
+  DWORD win_op = DROPEFFECT_NONE;
+  if (op & WebDragOperationCopy)
+    win_op |= DROPEFFECT_COPY;
+  if (op & WebDragOperationLink)
+    win_op |= DROPEFFECT_LINK;
+  if (op & WebDragOperationMove)
+    win_op |= DROPEFFECT_MOVE;
+  return win_op;
+}
+
 }  // namespace
 
 class DragDropThread : public base::Thread {
@@ -287,8 +301,7 @@ void TabContentsDragWin::DoDragging(const WebDropData& drop_data,
   bool old_state = MessageLoop::current()->NestableTasksAllowed();
   MessageLoop::current()->SetNestableTasksAllowed(true);
   DoDragDrop(OSExchangeDataProviderWin::GetIDataObject(data), drag_source_,
-             DROPEFFECT_COPY | DROPEFFECT_LINK, &effects);
-  // TODO(snej): Use 'ops' param instead of hardcoding dropeffects
+             WebDragOpToWinDragOp(ops), &effects);
   MessageLoop::current()->SetNestableTasksAllowed(old_state);
 }