Remove VirtualFrame::CallStoreIC(void) and CallCommonStoreIC from virtual-frame-x64.cc.  Make implementations of CallStoreIC(key, is_contextual) and CallKeyedStoreIC() the same on x64 and ia32.  Make ia32 and x64 implementations more alike by moving some functions and changing comments. 
Review URL: http://codereview.chromium.org/3060002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5113 ce2b1a6d-e550-0410-aec6-3dcde31c8c00