Simplify main resource load start/end in FrameLoader and DocumentLoader.

[Nate Chapin]

Examples:
* A circular call in FrameLoader -> DocumentLoader::prepareForLoadStart() -> FrameLoader::prepareForLoadStart().
* DocumentLoader::m_primaryLoadComplete is basically the same as a non-null m_mainResourceLoader.

I've got a couple of other small ones, patch shortly.

[Nate Chapin]

Created attachment 135170 [details]
patch

[Adam Barth]

Comment on attachment 135170 [details]
patch

View in context: https://bugs.webkit.org/attachment.cgi?id=135170&action=review

> Source/WebCore/WebCore.exp.in:-330
> -__ZN7WebCore14DocumentLoader19prepareForLoadStartEv

Are there no callers in the WebKit-layer anymore?

[Nate Chapin]

(In reply to comment #2)
> (From update of attachment 135170 [details])
> View in context: https://bugs.webkit.org/attachment.cgi?id=135170&action=review
> 
> > Source/WebCore/WebCore.exp.in:-330
> > -__ZN7WebCore14DocumentLoader19prepareForLoadStartEv
> 
> Are there no callers in the WebKit-layer anymore?

According to http://code.google.com/searchframe#search/&exact_package=chromium&q=prepareForLoadStart&type=cs , it's only called from FrameLoader.

[Adam Barth]

Comment on attachment 135170 [details]
patch

Ok.

[WebKit Review Bot]

Comment on attachment 135170 [details]
patch

Clearing flags on attachment: 135170

Committed r112949: <http://trac.webkit.org/changeset/112949>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.