Attempt 2 at:

views/event.h

 // Copyright (c) 2006-2008 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.
 
 #ifndef VIEWS_EVENT_H_
 #define VIEWS_EVENT_H_
 
 #include "base/basictypes.h"
 #include "base/keyboard_codes.h"
 #include "gfx/point.h"
@@ skipping 23 matching lines @@
 class Event {
  public:
   // Event types. (prefixed because of a conflict with windows headers)
   enum EventType { ET_UNKNOWN = 0,
                    ET_MOUSE_PRESSED,
                    ET_MOUSE_DRAGGED,
                    ET_MOUSE_RELEASED,
                    ET_MOUSE_MOVED,
                    ET_MOUSE_ENTERED,
                    ET_MOUSE_EXITED,
+                   ET_MOUSE_NEAR,
+                   ET_MOUSE_EXITED_NEAR,
                    ET_KEY_PRESSED,
                    ET_KEY_RELEASED,
                    ET_MOUSEWHEEL,
                    ET_DROP_TARGET_EVENT };
 
   // Event flags currently supported.  Although this is a "views"
   // file, this header is used on non-views platforms (e.g. OSX).  For
   // example, these EventFlags are used by the automation provider for
   // all platforms.
   enum EventFlags { EF_SHIFT_DOWN         = 1 << 0,
@@ skipping 39 matching lines @@
     return (flags_ & EF_ALT_DOWN) != 0;
   }
 
   bool IsMouseEvent() const {
     return type_ == ET_MOUSE_PRESSED ||
            type_ == ET_MOUSE_DRAGGED ||
            type_ == ET_MOUSE_RELEASED ||
            type_ == ET_MOUSE_MOVED ||
            type_ == ET_MOUSE_ENTERED ||
            type_ == ET_MOUSE_EXITED ||
-           type_ == ET_MOUSEWHEEL;
+           type_ == ET_MOUSEWHEEL ||
+           type_ == ET_MOUSE_NEAR ||
+           type_ == ET_MOUSE_EXITED_NEAR;
   }
 
 #if defined(OS_WIN)
   // Returns the EventFlags in terms of windows flags.
   int GetWindowsFlags() const;
 
   // Convert windows flags to views::Event flags
   static int ConvertWindowsFlags(uint32 win_flags);
 #elif defined(OS_LINUX)
   // Convert the state member on a GdkEvent to views::Event flags
@@ skipping 225 matching lines @@
  private:
   const OSExchangeData& data_;
   int source_operations_;
 
   DISALLOW_COPY_AND_ASSIGN(DropTargetEvent);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_EVENT_H_