Support dragging a virtual file out of the browser.

base/message_pump_win.cc

 // Copyright (c) 2009 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 "base/message_pump_win.h"
 
 #include <math.h>
 
 #include "base/histogram.h"
 #include "base/win_util.h"
@@ skipping 333 matching lines @@
     // GetMessage() loop.
     state_->should_quit = true;
     PostQuitMessage(static_cast<int>(msg.wParam));
     return false;
   }
 
   // While running our main message pump, we discard kMsgHaveWork messages.
   if (msg.message == kMsgHaveWork && msg.hwnd == message_hwnd_)
     return ProcessPumpReplacementMessage();
 
+  if (CallMsgFilter(const_cast<MSG*>(&msg), kMessageFilterCode))
+    return true;
+
   WillProcessMessage(msg);
 
   if (state_->dispatcher) {
     if (!state_->dispatcher->Dispatch(msg))
       state_->should_quit = true;
   } else {
     TranslateMessage(&msg);
     DispatchMessage(&msg);
   }
 
@@ skipping 184 matching lines @@
     if (!filter || it->handler == filter) {
       *item = *it;
       completed_io_.erase(it);
       return true;
     }
   }
   return false;
 }
 
 }  // namespace base