Issue #1751 -- Remove XP_MACOSX conditionals from the rest of the tree.

This also removes some PP abuse and takes file entries out of PP when no longer
needed without XP_MACOSX conditionals.

view/nsView.cpp

@@ -241,8 +241,8 @@ LayoutDeviceIntRect nsView::CalcWidgetBounds(nsWindowType aType)
   LayoutDeviceIntRect newBounds =
     LayoutDeviceIntRect::FromUnknownRect(viewBounds.ToNearestPixels(p2a));
 
-#if defined(XP_MACOSX) || (MOZ_WIDGET_GTK == 3)
-  // cocoa and GTK round widget coordinates to the nearest global "display
+#if (MOZ_WIDGET_GTK == 3)
+  // GTK 3 rounds widget coordinates to the nearest global "display
   // pixel" integer value. So we avoid fractional display pixel values by
   // rounding to the nearest value that won't yield a fractional display pixel.
   nsIWidget* widget = parentWidget ? parentWidget : mWindow.get();

view/nsViewManager.cpp

@@ -598,10 +598,7 @@ nsViewManager::InvalidateWidgetArea(nsView *aWidgetView,
                      "Only plugin or popup widgets can be children!");
 
         // We do not need to invalidate in plugin widgets, but we should
-        // exclude them from the invalidation region IF we're not on
-        // Mac. On Mac we need to draw under plugin widgets, because
-        // plugin widgets are basically invisible
-#ifndef XP_MACOSX
+        // exclude them from the invalidation region.
         // GetBounds should compensate for chrome on a toplevel widget
         LayoutDeviceIntRect bounds = childWidget->GetBounds();
 
@@ -613,7 +610,6 @@ nsViewManager::InvalidateWidgetArea(nsView *aWidgetView,
           children.Or(children, rr - aWidgetView->ViewToWidgetOffset());
           children.SimplifyInward(20);
         }
-#endif
       }
     }
   }