[BlackBerry] Webpage was cut off after rotating to landscape and then rotating back to portrait on specific website

[Xiaobo Wang]

PR 284985

Steps to Reproduce:
1)Launch browser
2)go to http://luotuo.tmall.com/ 
3)Wait until the full page is loaded, then rotate device to landscape mode
4) Rotate it back to portrait mode
...
5)

Expected Results:

There is no rendering issue

Actual Results:

After step 4, the right side of the webpage was cut off.

[Xiaobo Wang]

When rotating back to portrait, WebPagePrivate::overflowExceedsContentsSize()
was called. It will call setViewMode(), in which we will get fixedLayoutSize()
and compare with the fixedLayoutSize in the FrameView. But
WebPagePrivate::fixedLaoutSize() returned wrong size because the width was
reset to 0 and then fallback to defaultLayoutSize.width(). 
        if (m_pendingOrientation != -1 && !m_nestedLayoutFinishedCount)
            width = 0;
Can be fixed by adding a check of m_overflowExceedsContentsSize, only reset
width if m_overflowExceedsContentsSize is not true.

[Xiaobo Wang]

Created attachment 185378 [details]
patch

[Rob Buis]

Comment on attachment 185378 [details]
patch

LGTM.

[WebKit Review Bot]

Comment on attachment 185378 [details]
patch

Clearing flags on attachment: 185378

Committed r141276: <http://trac.webkit.org/changeset/141276>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.