Fix progress bar regression on Mac

Source/platform/mac/LocalCurrentGraphicsContext.mm

Index: Source/platform/mac/LocalCurrentGraphicsContext.mm
diff --git a/Source/platform/mac/LocalCurrentGraphicsContext.mm b/Source/platform/mac/LocalCurrentGraphicsContext.mm
index 04a75369ddc5334d756a357413e8a9585afa60c6..4f4935f6c039a74c94ad4ca53135bfa572f70f31 100644
--- a/Source/platform/mac/LocalCurrentGraphicsContext.mm
+++ b/Source/platform/mac/LocalCurrentGraphicsContext.mm
@@ -67,12 +67,4 @@ CGContextRef LocalCurrentGraphicsContext::cgContext()
     return cgContext;
 }
 
-ContextContainer::ContextContainer(GraphicsContext* graphicsContext,
-                                   IntRect clipRect)
-    : m_skiaBitLocker(graphicsContext->canvas(),
-                      ThemeMac::inflateRectForAA(clipRect),
-                      graphicsContext->deviceScaleFactor())
-{
-}
-
 }