[Webkit-unassigned] [Bug 63851] New: Crash when loading a document in an editable WebView that has a subframe with an unstyled body

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=63851

           Summary: Crash when loading a document in an editable WebView
                    that has a subframe with an unstyled body
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: adele at apple.com


Crash when loading a document in an editable WebView that has a subframe with a body element with no style

Unfortunately, there's no way for me to test this in Safari, and I was unable to get this to crash in DumpRenderTree.

This patch fixes two problems:
1) In Editor::applyEditingStyleToElement, we assert that there element has style, but in this case I ran into, it did not.  So I added an early return here.
2) In -[WebHTMLRepresentation finishedLoadingWithDataSource:], instead of applying the desirable editing style to any body element, only do it for the main frame.  There's no need to apply break-word, space, and after-white-space properties to subframes in the editable document.

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