Bug 1392523. Remove duplicated gfxContext* parameter. r=mattwoodrow

All of the callers are passing in the same value for
both gfxContexts.

layout/painting/FrameLayerBuilder.cpp

@@ -5972,14 +5972,13 @@ void
 FrameLayerBuilder::PaintItems(nsTArray<ClippedDisplayItem>& aItems,
                               const nsIntRect& aRect,
                               gfxContext *aContext,
-                              gfxContext *aRC,
                               nsDisplayListBuilder* aBuilder,
                               nsPresContext* aPresContext,
                               const nsIntPoint& aOffset,
                               float aXScale, float aYScale,
                               int32_t aCommonClipCount)
 {
-  DrawTarget& aDrawTarget = *aRC->GetDrawTarget();
+  DrawTarget& aDrawTarget = *aContext->GetDrawTarget();
 
   int32_t appUnitsPerDevPixel = aPresContext->AppUnitsPerDevPixel();
   nsRect boundRect = ToAppUnits(aRect, appUnitsPerDevPixel);
@@ -6032,7 +6031,7 @@ FrameLayerBuilder::PaintItems(nsTArray<ClippedDisplayItem>& aItems,
 
     if (cdi->mInactiveLayerManager) {
       bool saved = aDrawTarget.GetPermitSubpixelAA();
-      PaintInactiveLayer(aBuilder, cdi->mInactiveLayerManager, cdi->mItem, aContext, aRC);
+      PaintInactiveLayer(aBuilder, cdi->mInactiveLayerManager, cdi->mItem, aContext, aContext);
       aDrawTarget.SetPermitSubpixelAA(saved);
     } else {
       nsIFrame* frame = cdi->mItem->Frame();
@@ -6045,7 +6044,7 @@ FrameLayerBuilder::PaintItems(nsTArray<ClippedDisplayItem>& aItems,
       } else
 #endif
       {
-        cdi->mItem->Paint(aBuilder, aRC);
+        cdi->mItem->Paint(aBuilder, aContext);
       }
     }
 
@@ -6201,7 +6200,7 @@ FrameLayerBuilder::DrawPaintedLayer(PaintedLayer* aLayer,
         aContext->CurrentMatrix().PreTranslate(aLayer->GetResidualTranslation() - gfxPoint(offset.x, offset.y)).
                                   PreScale(userData->mXScale, userData->mYScale));
 
-      layerBuilder->PaintItems(entry->mItems, iterRect, aContext, aContext,
+      layerBuilder->PaintItems(entry->mItems, iterRect, aContext,
                                builder, presContext,
                                offset, userData->mXScale, userData->mYScale,
                                entry->mCommonClipCount);
@@ -6217,7 +6216,7 @@ FrameLayerBuilder::DrawPaintedLayer(PaintedLayer* aLayer,
       aContext->CurrentMatrix().PreTranslate(aLayer->GetResidualTranslation() - gfxPoint(offset.x, offset.y)).
                                 PreScale(userData->mXScale,userData->mYScale));
 
-    layerBuilder->PaintItems(entry->mItems, aRegionToDraw.GetBounds(), aContext, aContext,
+    layerBuilder->PaintItems(entry->mItems, aRegionToDraw.GetBounds(), aContext,
                              builder, presContext,
                              offset, userData->mXScale, userData->mYScale,
                              entry->mCommonClipCount);

layout/painting/FrameLayerBuilder.h

@@ -674,7 +674,6 @@ protected:
   void PaintItems(nsTArray<ClippedDisplayItem>& aItems,
                   const nsIntRect& aRect,
                   gfxContext* aContext,
-                  gfxContext* aRC,
                   nsDisplayListBuilder* aBuilder,
                   nsPresContext* aPresContext,
                   const nsIntPoint& aOffset,