Specify clip rects when drawing Mac native widgets

Source/platform/mac/LocalCurrentGraphicsContext.h

Index: Source/platform/mac/LocalCurrentGraphicsContext.h
diff --git a/Source/platform/mac/LocalCurrentGraphicsContext.h b/Source/platform/mac/LocalCurrentGraphicsContext.h
index 0d9bf0d2fe7ed5429561193f885dcc61446d9aa9..a07200b694cb7a448928d3f8fb64ca221c3e26b8 100644
--- a/Source/platform/mac/LocalCurrentGraphicsContext.h
+++ b/Source/platform/mac/LocalCurrentGraphicsContext.h
@@ -17,6 +17,7 @@
  * Boston, MA 02110-1301, USA.
  */
 
+#include "platform/Geometry/IntRect.h"
 #include "platform/PlatformExport.h"
 #include "skia/ext/skia_utils_mac.h"
 #include "wtf/Noncopyable.h"
@@ -32,10 +33,11 @@ class GraphicsContext;
 class PLATFORM_EXPORT LocalCurrentGraphicsContext {
     WTF_MAKE_NONCOPYABLE(LocalCurrentGraphicsContext);
 public:
-    LocalCurrentGraphicsContext(GraphicsContext* graphicsContext);
+    LocalCurrentGraphicsContext(GraphicsContext*, IntRect clipRect);
     ~LocalCurrentGraphicsContext();
     CGContextRef cgContext();
 private:
+
     GraphicsContext* m_savedGraphicsContext;
     NSGraphicsContext* m_savedNSGraphicsContext;
     bool m_didSetGraphicsContext;