Bug 780474 - Disable the struct/class mismatch warning on MSVC as well; r=glandium

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extra : rebase_source : 3e593b71e589df349abc41f9182739305478690f
Bug 844169 - Part 1: Rename nsHTMLIFrameElement to mozilla::dom::HTMLIFrameElement; r=bzbarsky

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rename : content/html/content/src/nsHTMLIFrameElement.cpp => content/html/content/src/HTMLIFrameElement.cpp
rename : content/html/content/src/nsHTMLIFrameElement.h => content/html/content/src/HTMLIFrameElement.h
extra : rebase_source : 67c393954a0c46f80b8729277504e9ced5c64d33