Backout c99d15a060e2 for causing windows Ru reftest failures.

gfx/2d/2D.h

@@ -888,7 +888,7 @@ public:
     return mOpaqueRect;
   }
 
-  virtual void SetPermitSubpixelAA(bool aPermitSubpixelAA) {
+  void SetPermitSubpixelAA(bool aPermitSubpixelAA) {
     mPermitSubpixelAA = aPermitSubpixelAA;
   }
 

gfx/2d/DrawTargetCairo.cpp

@@ -843,14 +843,6 @@ DrawTargetCairo::Fill(const Path *aPath,
   DrawPattern(aPattern, StrokeOptions(), aOptions, DRAW_FILL);
 }
 
-void
-DrawTargetCairo::SetPermitSubpixelAA(bool aPermitSubpixelAA)
-{
-  DrawTarget::SetPermitSubpixelAA(aPermitSubpixelAA);
-  cairo_surface_set_subpixel_antialiasing(mSurface,
-    aPermitSubpixelAA ? CAIRO_SUBPIXEL_ANTIALIASING_ENABLED : CAIRO_SUBPIXEL_ANTIALIASING_DISABLED);
-}
-
 void
 DrawTargetCairo::FillGlyphs(ScaledFont *aFont,
                             const GlyphBuffer &aBuffer,

gfx/2d/DrawTargetCairo.h

@@ -60,8 +60,6 @@ public:
   virtual TemporaryRef<SourceSurface> Snapshot();
   virtual IntSize GetSize();
 
-  virtual void SetPermitSubpixelAA(bool aPermitSubpixelAA);
-
   virtual bool LockBits(uint8_t** aData, IntSize* aSize,
                         int32_t* aStride, SurfaceFormat* aFormat);
   virtual void ReleaseBits(uint8_t* aData);