Don't track mouse events in HWNDMessageHandler when they are forwarded by the LegacyRenderWidgetHost

content/browser/renderer_host/legacy_render_widget_host_win.h

 // Copyright (c) 2014 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 CONTENT_BROWSER_RENDERER_HOST_LEGACY_RENDER_WIDGET_HOST_WIN_H_
 #define CONTENT_BROWSER_RENDERER_HOST_LEGACY_RENDER_WIDGET_HOST_WIN_H_
 
 #include <atlbase.h>
 #include <atlwin.h>
 #include <atlcrack.h>
@@ skipping 49 matching lines @@
   // in.
   static scoped_ptr<LegacyRenderWidgetHostHWND> Create(HWND parent);
 
   BEGIN_MSG_MAP_EX(LegacyRenderWidgetHostHWND)
     MESSAGE_HANDLER_EX(WM_GETOBJECT, OnGetObject)
     MESSAGE_RANGE_HANDLER(WM_KEYFIRST, WM_KEYLAST, OnKeyboardRange)
     MESSAGE_HANDLER_EX(WM_PAINT, OnPaint)
     MESSAGE_HANDLER_EX(WM_NCPAINT, OnNCPaint)
     MESSAGE_HANDLER_EX(WM_ERASEBKGND, OnEraseBkGnd)
     MESSAGE_RANGE_HANDLER(WM_MOUSEFIRST, WM_MOUSELAST, OnMouseRange)
+    MESSAGE_HANDLER_EX(WM_MOUSELEAVE, OnMouseLeave)
     MESSAGE_HANDLER_EX(WM_MOUSEACTIVATE, OnMouseActivate)
     MESSAGE_HANDLER_EX(WM_SETCURSOR, OnSetCursor)
     MESSAGE_HANDLER_EX(WM_TOUCH, OnTouch)
   END_MSG_MAP()
 
   HWND hwnd() { return m_hWnd; }
 
   // Called when the child window is to be reparented to a new window.
   // The |parent| parameter contains the new parent window.
   void UpdateParent(HWND parent);
@@ skipping 20 matching lines @@
 
  private:
   LegacyRenderWidgetHostHWND(HWND parent);
 
   bool Init();
 
   LRESULT OnEraseBkGnd(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnGetObject(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnKeyboardRange(UINT message, WPARAM w_param, LPARAM l_param,
                           BOOL& handled);
+  LRESULT OnMouseLeave(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnMouseRange(UINT message, WPARAM w_param, LPARAM l_param,
                        BOOL& handled);
   LRESULT OnMouseActivate(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnTouch(UINT message, WPARAM w_param, LPARAM l_param);
 
   LRESULT OnNCPaint(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnPaint(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnSetCursor(UINT message, WPARAM w_param, LPARAM l_param);
 
   content::BrowserAccessibilityManagerWin* manager_;
   base::win::ScopedComPtr<IAccessible> window_accessible_;
 
+  // Set to true if we turned on mouse tracking.
+  bool mouse_tracking_enabled_;
+
   DISALLOW_COPY_AND_ASSIGN(LegacyRenderWidgetHostHWND);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_LEGACY_RENDER_WIDGET_HOST_WIN_H_