Add nsPresContext::AppUnitsToGfxUnits(const nsRect&)

b=430450 r+sr=roc

layout/base/nsPresContext.h

@@ -62,8 +62,8 @@
 #include "nsInterfaceHashtable.h"
 #include "nsCycleCollectionParticipant.h"
 #include "nsChangeHint.h"
-// XXX we need only gfxTypes.h, but we cannot include it directly.
-#include "gfxPoint.h"
+// This also pulls in gfxTypes.h, which we cannot include directly.
+#include "gfxRect.h"
 class nsImageLoader;
 #ifdef IBMBIDI
 class nsBidiPresUtils;
@@ -520,6 +520,12 @@ public:
   gfxFloat AppUnitsToGfxUnits(nscoord aAppUnits) const
   { return mDeviceContext->AppUnitsToGfxUnits(aAppUnits); }
 
+  gfxRect AppUnitsToGfxUnits(const nsRect& aAppRect) const
+  { return gfxRect(AppUnitsToGfxUnits(aAppRect.x),
+                   AppUnitsToGfxUnits(aAppRect.y),
+                   AppUnitsToGfxUnits(aAppRect.width),
+                   AppUnitsToGfxUnits(aAppRect.height)); }
+
   nscoord TwipsToAppUnits(PRInt32 aTwips) const
   { return NSToCoordRound(NS_TWIPS_TO_INCHES(aTwips) *
                           mDeviceContext->AppUnitsPerInch()); }