Moving GraphicsContext and dependencies from core to platform.

Source/web/mac/WebSubstringUtil.mm

 /*
  * Copyright (C) 2005, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 28 matching lines @@
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/dom/Node.h"
 #include "core/dom/Range.h"
 #include "core/editing/FrameSelection.h"
 #include "core/editing/PlainTextRange.h"
 #include "core/editing/TextIterator.h"
 #include "core/html/HTMLElement.h"
 #include "core/frame/Frame.h"
 #include "core/frame/FrameView.h"
-#include "core/platform/graphics/Font.h"
-#include "core/platform/graphics/mac/ColorMac.h"
 #include "core/rendering/RenderObject.h"
 #include "core/rendering/style/RenderStyle.h"
+#include "platform/fonts/Font.h"
+#include "platform/mac/ColorMac.h"
 #include "public/platform/WebRect.h"
 
 using namespace WebCore;
 
 namespace blink {
 
 NSAttributedString* WebSubstringUtil::attributedSubstringInRange(WebFrame* webFrame, size_t location, size_t length)
 {
     Frame* frame = toWebFrameImpl(webFrame)->frame();
     if (frame->view()->needsLayout())
@@ skipping 46 matching lines @@
                                            length:characters.size()] autorelease];
         [string replaceCharactersInRange:NSMakeRange(position, 0)
                               withString:substring];
         [string setAttributes:attrs range:NSMakeRange(position, numCharacters)];
         position += numCharacters;
     }
     return [string autorelease];
 }
 
 } // namespace blink