[Title] Fix BS in m.nate.com
[Issue#] N/A
[Problem] BS occurred when clicking the link in m.nate.com
[Cause] There is no check for page()
[Solution] Add the check for page()
Change-Id: I8c82109dcdbb8b1e4f93ff3fbca579a954bd4264
frame()->eventHandler()->stopAutoscrollTimer(true);
#if ENABLE(TIZEN_SCREEN_READER)
frame()->eventHandler()->stopAutoscrollTimer(true);
#if ENABLE(TIZEN_SCREEN_READER)
+ if (frame() && frame()->page())
frame()->page()->chrome()->client()->rendererWillBeDestroyed(this);
#endif
frame()->page()->chrome()->client()->rendererWillBeDestroyed(this);
#endif