Bug 1015781 - part 1+2, Make the SetInitialChildList/AppendFrames/InsertFrames/RemoveFrame methods return void (scripted change).  Remove code handling the return values.  r=roc
Bug 1015781 - part 3, Fix whitespace and comments, and move some SetInitialChildList/AppendFrames/InsertFrames/RemoveFrame methods so that they are together in the file.  r=roc
Bug 1015781 - part 4, Make nsColumnSetFrame::SetInitialChildList/AppendFrames/InsertFrames/RemoveFrame DEBUG only and assert that the latter three are not called.  r=roc
Bug 1015781 - part 5, Make nsCanvasFrame::SetInitialChildList/AppendFrames/InsertFrames/RemoveFrame DEBUG only.  r=roc
Bug 1015781 - part 6, Make nsViewportFrame::SetInitialChildList/AppendFrames/InsertFrames/RemoveFrame DEBUG only.  r=roc
Bug 1015781 - part 7, Remove code for handling kAbsoluteList in nsBlockFrame::AppendFrames/InsertFrames/RemoveFrame (it's dead code).  Make AppendFrames also handle kNoReflowPrincipalList, for symmetry with InsertFrames/RemoveFrame.  r=roc
Bug 1015781 - part 8, Make nsTableCellFrame::AppendFrames/InsertFrames/RemoveFrame DEBUG only.  r=roc
Bug 1015781 - part 9, Make nsFieldSetFrame::SetInitialChildList/AppendFrames/InsertFrames/RemoveFrame DEBUG only.  r=roc
Bug 1015781 - part 10, Make nsHTMLButtonControlFrame::AppendFrames/InsertFrames/RemoveFrame DEBUG only.  r=roc
Bug 1015781 - part 11, Add more assertions in nsTableOuterFrame::SetInitialChildList/AppendFrames/InsertFrames.  r=roc