Add a self-destruct mechanism to user-level Chrome Frame when it detects that system-level Chrome...

chrome_frame/chrome_frame_helper_util.h

Index: chrome_frame/chrome_frame_helper_util.h
===================================================================
--- chrome_frame/chrome_frame_helper_util.h	(revision 85906)
+++ chrome_frame/chrome_frame_helper_util.h	(working copy)
@@ -68,4 +68,16 @@
                        DWORD thread_id_to_match,
                        DWORD process_id_to_match);
 
+// Reads |value_size| characters from a value named |value_name| in |key| and
+// places them in the buffer pointed to by |value|. Returns ERROR_SUCCESS on
+// success.
+LONG ReadValue(HKEY key,
+               const wchar_t* value_name,
+               size_t value_size,
+               wchar_t* value);
+
+// Returns true if system-level Chrome Frame is installed and the BHO is
+// registered in HKLM.
+bool IsSystemLevelChromeFrameInstalled();
+
 #endif  // CHROME_FRAME_CHROME_FRAME_HELPER_UTIL_H_