Windows build fix.

Change-Id: Ia118c81e39f5f48d4678cc375bad45f31ba8322e
Remove 'virtual' keyword.  Nobody overwrites this.

Change-Id: I02499441f00d6499a576d97115df0ad1d85dcd5e
Rename aRect -> maRect for a member variable.

Change-Id: I12dc6c12ee44753c63b15f03276cdaa24e57d395
Create a variant of MakeNewObject that takes snap rectangle.

And absorb 2 special cases from SvxDrawPage::_CreateSdrObject().

Change-Id: I8e400794b9aef4b229b6760835b80dffd56cbc8d