[tor-bugs] #19459 [Applications/Tor Browser]: Write (C++) patch for window resizing parts

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#19459: Write (C++) patch for window resizing parts
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 Reporter:  gk                                   |          Owner:
                                                 |  arthuredelstein
     Type:  task                                 |         Status:
                                                 |  needs_review
 Priority:  Medium                               |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-torbutton-conversion,            |  Actual Points:
  TorBrowserTeam201610                           |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
                                                 |  SponsorU
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Comment (by arthuredelstein):

 Replying to [comment:32 gk]:

 Thanks as always for testing and reviewing!

 > 1) We might want to add an `NS_ENSURE_STATE(shellWindow);` after and an
 `NS_ENSURE_STATE(mPrimaryContentShell);` before
 > `nsCOMPtr<nsIBaseWindow>
 shellWindow(do_QueryInterface(mPrimaryContentShell));`. There is code that
 does this in r306252 and this seems reasonable to me.

 Added.

 > 2) We might want to check the return value of `GetAvailScreenSize()`
 called in `ResizeToBoundedDimensions()` as well (as is done at the other
 place you use it)? Not sure what should happen in case this fails, though.

 I have added this as well. For now it causes ResizeToBoundedDimensions to
 abort.

 > Regarding my testing: it looks good on all machines I tried it. I
 encounerted an issue I mentioned in comment:18 (1)) again but after
 digging a bit deeper it seems older versions have this problem, too. So,
 no regression at least. This is #18175 fwiw.

 I was able to reproduce this problem on a Windows machine and fixed it by
 adding a little piece of the old JS patch. It's annoying to me to have to
 add special-case code to two different files, but there is so much magic
 in Firefox window sizing that I don't know how else to do it. I wonder if
 this patch fixes the problem on your test system as well.

 Here's the new version:
 ​https://github.com/arthuredelstein/tor-browser/commit/19459+13

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19459#comment:33>
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