Fix for 593676 - Minimizes/eliminates momentary flash of Windows frame

ui/views/win/hwnd_message_handler.h

Index: ui/views/win/hwnd_message_handler.h
diff --git a/ui/views/win/hwnd_message_handler.h b/ui/views/win/hwnd_message_handler.h
index bf25d11eb77e245539acacd836bcfca7fa3c792c..643b88e7160d2d61b41c6f4f3557dc202837e72e 100644
--- a/ui/views/win/hwnd_message_handler.h
+++ b/ui/views/win/hwnd_message_handler.h
@@ -211,6 +211,7 @@ class VIEWS_EXPORT HWNDMessageHandler :
 
  private:
   typedef std::set<DWORD> TouchIDs;
+  enum class DwmFrameState {OFF, ON};

[Ben Goodger (Google), 2016/06/30 00:01:00]

nit: space between { & O and N & }

 
   // Overridden from WindowImpl:
   HICON GetDefaultWindowIcon() const override;
@@ -314,6 +315,10 @@ class VIEWS_EXPORT HWNDMessageHandler :
 
   bool HasSystemFrame() const;
 
+  // Adds or removes the frame extension into client area with
+  // DwmExtendFrameIntoClientArea.
+  void SetDwmFrameExtension(DwmFrameState state);
+
   // Message Handlers ----------------------------------------------------------
 
   BEGIN_SAFE_MSG_MAP_EX(weak_factory_)