Remove GraphicsContext::fastMod and ::isDrawingToLayer.

Source/platform/graphics/GraphicsContext.cpp

Index: Source/platform/graphics/GraphicsContext.cpp
diff --git a/Source/platform/graphics/GraphicsContext.cpp b/Source/platform/graphics/GraphicsContext.cpp
index de6143bc25d1b4ffc9acf2762cfb0d2c39f96019..01afdb9e498738c88fb39b3959b8aed989e41b91 100644
--- a/Source/platform/graphics/GraphicsContext.cpp
+++ b/Source/platform/graphics/GraphicsContext.cpp
@@ -381,7 +381,7 @@ bool GraphicsContext::couldUseLCDRenderedText()
     // rendered text cannot be composited correctly when the layer is
     // collapsed. Therefore, subpixel text is contextDisabled when we are drawing
     // onto a layer.
-    if (contextDisabled() || isDrawingToLayer() || !isCertainlyOpaque())
+    if (contextDisabled() || m_canvas->isDrawingToLayer() || !isCertainlyOpaque())
         return false;
 
     return shouldSmoothFonts();