Bug 1224403 (part 3) - Make mNonClientOffset a LayoutDeviceIntMargin. r=kats.

Surprisingly enough, this requires no other changes, because it's only ever
accessed on a per-field basis, rather than the entire struct at once.

--HG--
extra : rebase_source : a3b1efad0dae6b1ddab3ab77f046e2924c62231b

widget/windows/nsWindow.h

@@ -515,7 +515,7 @@ protected:
 
   // Non-client margin settings
   // Pre-calculated outward offset applied to default frames
-  nsIntMargin           mNonClientOffset;
+  mozilla::LayoutDeviceIntMargin mNonClientOffset;
   // Margins set by the owner
   nsIntMargin           mNonClientMargins;
   // Margins we'd like to set once chrome is reshown: