Remove the dynamic initialization of WebKitSystemInterface. Just call into the library directly.

Source/core/platform/mac/ThemeMac.mm

 /*
  * Copyright (C) 2008, 2010, 2011, 2012 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 473 matching lines @@
         }
     } 
 
     LocalCurrentGraphicsContext localContext(context);
     NSView *view = ThemeMac::ensuredView(scrollView);
     NSWindow *window = [view window];
     NSButtonCell *previousDefaultButtonCell = [window defaultButtonCell];
 
     if (states & DefaultState) {
         [window setDefaultButtonCell:buttonCell];
-        wkAdvanceDefaultButtonPulseAnimation(buttonCell);
+        WKAdvanceDefaultButtonPulseAnimation(buttonCell);
     } else if ([previousDefaultButtonCell isEqual:buttonCell])
         [window setDefaultButtonCell:nil];
 
     [buttonCell drawWithFrame:NSRect(inflatedRect) inView:view];
 #if !BUTTON_CELL_DRAW_WITH_FRAME_DRAWS_FOCUS_RING
     if (states & FocusState)
         [buttonCell _web_drawFocusRingWithFrame:NSRect(inflatedRect) inView:view];
 #endif
     [buttonCell setControlView:nil];
 
@@ skipping 246 matching lines @@
             break;
         case InnerSpinButtonPart:
             paintStepper(states, context, zoomedRect, zoomFactor, scrollView);
             break;
         default:
             break;
     }
 }
 
 }